2025 Mercedes-Benz E 350 TSBs

Cause Accidental or unnoticed activation of the button to open the tailgate on the vehicle key. EXAMPLE: when stored in trouser pocket, handbag etc. Remedy As of the 6th generation, the vehicle key can be recoded so that the tailgate no longer opens as a result of a long press on the button, but by doubleclicking on the button instead. This reduces the likelihood of the button being activated accidentally or unintentionally. The recoding can be carried out as follows: 1. Add SA Code O19 into VeDoc (O for Oscar, not "zero") an XSS ticket may be necessary to add the SA code 2. Perform SCN coding of EIS N73 control unit 3. Deactivate the vehicle key (a successful deactivation is indicated by the LED lighting up 2x briefly and then 1x for a long period). 4. Place the vehicle key in the storage compartment on the key symbol and turn on the ignition. IMPORTANT: all other vehicle keys must be outside the recognition range of the vehicle when doing this! Perform steps 3 and 4 successively for all vehicle keys. Notes: 6th, 7th and 8th generation keys can be deactivated as follows: Up to modification year 22/1 by double clicking the "Lock button" As of modification year 22/1, by press and holding the Lock button", then doubleclick the Unlock button" at the same time. On model series 167, the storage compartment with the key symbol is located in the armrest. The SCN coding from the EZS is only transferred correctly to the vehicle key under the following conditions: Only one vehicle key is located in the vehicle, this key has been deactivated and it is positioned on the marking in the storage compartment for the data transfer. The costs for this adaptation are to be borne by the customer. For the newer BR 174, 178, 244, 248, 520, and 540, a software update must be initiated, as there is no way to perform SCN coding.

One or More PARK Sensor Activations 3. Red Ring Around Vehicle 4. "Active Parking and Parking Assist Inoperative" on Instrument Cluster 5. Cameras 6. Other Park Topics. Cause Various root causes Remedy See attached diagnostic guide.

Cause The firmware installation was incomplete. Remedy In the A26/17 control unit "MBUX multimedia system" (head unit), use XENTRY to carry out the special process "All Modules"; this will reinstall the firmware completely.

The secondary chamber is almost empty. The suction jet pump suctions up small quantities of fuel and air. This results in vibrations and turbulence, which make noises. These noises may sound like slurping. The fuel pump and the drained secondary chamber amplify certain noises which can be loud or shrill. The viscosity of the fuel and the intensity of the fuel pump also impact the noises. The fuel level is in the area of the saddle overflow in the primary chamber. The fuel mixed with air flows back into the secondary chamber. The noises may therefore be audible for longer If the primary chamber is no longer in the area of the saddle overflow, the noises should disappear because the secondary chamber no longer receives fuel. The area of the saddle overflow in the primary chamber is around +/- 2 liters of fuel volume (fuel gauge shows around half full). Remedy Refill/drain approx. 5 liters of fuel; if the noise is reduced/is no longer present due to this, the circumstance specified above is present Further measures may cause a reduction in noises in the specified area: In isolated cases, a fuel tank installed under stress may amplify the noises. The installation position of the fuel tank and the contact surfaces on the body-in-white should be checked here. To do so, release the fuel tank and refasten it, see WIS. Replacement of component parts such as fuel tank/delivery module does not provide a remedy! If a similar noise is heard, but the tank volume is 3/4 or 1/4 and not 1/2 as described above, another circumstance is present

Cause The firmware installation was incomplete. Remedy In the A26/17 control unit "MBUX multimedia system" (head unit), use XENTRY to carry out the special process "All Modules"; this will reinstall the firmware completely.

implausible (>365 days) for the following conditions: for the date of the vehicle handover or the last conducted and confirmed Service A/B Cause Case 1: Observe the following on vehicles with a disconnected on-board electrical system battery (12V/48V): The period in which the on-board electrical system battery is disconnected cannot be counted by the maintenance computer. As soon as the on-board electrical system battery is connected again, the maintenance computer automatically starts counting without making a correction to the remaining time (days until the next service). Case 2: If a disconnected on-board electrical system battery (12V/48V) can be ruled out as the cause, it is possible that: The daily turnover counter inside the electronic ignition lock (EIS) has experienced memory loss. This anomaly was detected in the EIS software from modification year 2022 onward. To do this, please check the plausibility of the daily turnover counter as follows: If "TUSZ Assyst Plus" < the actual days since "Handover Date/DAY/Month/Year," then proceed to remedy for case 2. Information: A variation of 2-3 days is still considered plausible. If "TUSZ Assyst Plus" is plausible, or if a remaining time of 365 days is permanently displayed, check whether the vehicle has been handed over. These types of cases have different causes. (The respective values are included in the maintenance data in the control unit log of the instrument cluster). Remedy For case 1: When the on-board electrical system battery is disconnected, this period must always be taken into account for these vehicles, and the following condition must be met for a correct calculation to be made: (A): The number of days from the "date of vehicle handover or last service A/B" to the "date on which the vehicle arrived at the workshop." (B): Remaining time (days until the next service, as shown in the instrument cluster). (C): Days on which the on-board electrical system battery was disconnected. The formula requires the following condition to be complied with. 365 - (A) [days] = (B) - (C) [days] For case 2: If the on-board electrical system battery (12 V/48 V) was not disconnected and the remaining time shown in the customer or workshop menu on the instrument cluster (days until the next service) is implausible in terms of the date of the vehicle handover or the last performed and confirmed service A/B, or the condition in the formula was not met, the service can still be performed and confirmed. For vehicles arriving more than 90 days after the service due date, the DSB service history can only be corrected by re-entering "Vehicle regularly serviced." A software fix for the EIS (electronic ignition lock) is currently in planning. The objective is to have a remedy available for 2026. Until the remedy is available, it is advisable to inform the customer that the next service is due again after 365 days at the latest.

- Creaking - Squeaking - Chattering - Humming - Grinding Cause At present, there are no known noise problems with the steering column. Remedy Check surrounding area of the steering column for possible noises. Instrument panel support Steering column switch module NOTE: Occasionally to verify complaint, the steering column/vehicle needs to be in direct sunlight or hot conditions for a few hours. If noise only occurs when adjusting the steering column via electric actuation, please perform: 1. Disassemble bellows of steering column tube module. 2. Move steering column entirely out and entirely down. 3. Grease steering column on all pivot points including, but not limited to, green-marked positions with a suitable brush (find pictures in attachment). 4. Move column up 1/4 of the way and grease again. 5. Continue until upper limit stop is reached. 6. Then move steering column adjustment in all directions from limit stop to limit stop several times to work in the grease. 7. If noise does not resolve, wipe excess grease off and perform greasing and movement to limit stops in all directions again. For all other noises or if the above does not resolve, create a TIPS case Body, Chassis, and Entertainment inbox. Attach a detailed description of the noise complaint, images, and a recording of the noise. Include detailed items of the following: Position of height and longitudinal adjustment when the noise occurs If possible, locate affected component part on steering column State any change in the noise when steering column component parts are touched (e.g. spring, etc.)

87 32) may trigger a fault message ("48 V Service Required" with fault codes P0ADA91, P0ADE91, P0AA100, P0ADD00 or P0AA000) in the instrument cluster. This fault message may prevent the 48 V battery contactors from opening automatically if the 12 V power supply is interrupted. In this case, the 48 V on-board electrical system, including connected components, remain energized. Cause The contactors of the 48 V battery do not open, resulting in residual voltage (> 3V) even when the 12 V battery is disconnected. Remedy When working on the 48 V on-board electrical system or connected components, ensure the component being repaired is de-energized in the 48 V system after disconnecting the 12 V ground line. Use a DVOM and ensure that there is less than 3V across the 48V terminals. If the voltage is less than 3V, the repair can be continued in accordance with the WIS documentation. If the voltage is greater than 3V, disconnect the ground line from the 48 V on-board electrical system battery and secure from contacting any ground points of the vehicle before continuing the repair. Once the work has been completed, follow the procedure for clearing the 48 V battery fault message as specified.

This may include: Seat memory Automatic seat adjustment Easy Entry/Exit Head restraint presetting Collision avoidance with bench seat at rear Actuation by other vehicle systems Seat normalization is missing, and fault code B228678 The control unit calibration has been lost or was not performed. Adaptation or adjustment is not correct. is stored in the seat control unit. Additional fault codes may also be present. Cause The condition is currently under investigation. Remedy Process any additional faults first. If a clear cause is found (for example, a failed component, wiring issue, or connector concern), repair that issue as required. If no root cause can be determined: Do NOT perform Initial Start-up, Software Update, or Normalization of the Control Unit Create a control unit log for the affected seat control unit. Open a TIPS case to the Body/Chassis/Entertainment inboxand attach the control unit log for further analysis.

One or More PARK Sensor Activations 3. Red Ring Around Vehicle 4. "Active Parking and Parking Assist Inoperative" on Instrument Cluster 5. Cameras 6. Other Park Topics Cause Various root causes Remedy See attached diagnostic guide.

Remedy Check surrounding area of the steering column for possible noises. Instrument panel support Steering column switch module If noise only occurs when adjusting the steering column via electric actuation please perform: 1. Disassemble bellows of steering column tube module. 2. Move steering column entirely out and entirely down. 3. Grease steering column on green-marked positions with a suitable brush (find pictures in attachment). 4. Move column up 1/4 of the way and grease again. 5. Continue until upper limit stop is reached. 6. Then move steering column adjustment in all directions from limit stop to limit stop several times to work in the grease. 7. If noise does not resolve, perform above procedure again and anywhere there are movement or friction points that the noise seems to be emanating from. 8. Then move steering column adjustment in all directions from limit stop to limit stop several times to work in the grease. 9. If noise still does not resolve, please open a TIPS case. For all other noises or if the above does not resolve, create a TIPS case Body, Chassis, and Entertainment inbox. Attach a detailed description of the noise complaint, images, and a recording of the noise. A detailed description includes: Position of height and longitudinal adjustment when the noise occurs If possible, locate affected component part on steering column State any change in the noise when steering column component parts are touched (e.g. spring, etc.)

Cause Accidental or unnoticed activation of the button to open the tailgate on the vehicle key. EXAMPLE: when stored in trouser pocket, handbag etc. Remedy As of the 6th generation, the vehicle key can be recoded so that the tailgate no longer opens as a result of a long press on the button, but by double-clicking on the button instead. This reduces the likelihood of the button being activated accidentally or unintentionally. The recoding can be carried out as follows: 1. Add SA Code O19 into VeDoc (O for Oscar, not "zero") an XSS ticket may be necessary to add the SA code 2. Perform SCN coding of EIS N73 control unit 3. Deactivate the vehicle key (a successful deactivation is indicated by the LED lighting up 2x briefly and then 1x for a long period). 4. Place the vehicle key in the storage compartment on the key symbol and turn on the ignition. IMPORTANT: all other vehicle keys must be outside the recognition range of the vehicle when doing this! Perform steps 3 and 4 successively for all vehicle keys. Notes: 6th, 7th and 8th generation keys can be deactivated as follows: Up to modification year 22/1 by double clicking the "Lock button" As of modification year 22/1, by press and holding the Lock button", then doubleclick the Unlock button" at the same time. On model series 167, the storage compartment with the key symbol is located in the armrest. The SCN coding from the EZS is only transferred correctly to the vehicle key under the following conditions: Only one vehicle key is located in the vehicle, this key has been deactivated and it is positioned on the marking in the storage compartment for the data transfer. The costs for this adaptation are to be borne by the customer.

One or More PARK Sensor Activations 3. Red Ring Around Vehicle 4. "Active Parking and Parking Assist Inoperative" on Instrument Cluster 5. Cameras 6. Other Park Topics Cause Various root causes Remedy See attached diagnostic guide.

No related error is stored in the quick test. Cause Under certain conditions, the electric seat adjustment switch may remain in sleep mode. It is then not possible to adjust the seat using this switch. This is a software error. Remedy To restore functionality, perform the following steps: 1. Remove the door trim from the affected door. 2. Unplug and reconnect the plug of the electric seat adjustment switch (No. 2 in the picture in work instruction AR91.29-P-2522WT) to perform a reset of the switch. Note: The switch does not need to be removed for this. 3. To prevent this problem from recurring, the current software version A2239029930 should be installed on the switch module Seat Adjustment Switch Group . Example: S22 - Select S22 Seat Adjustment Switch Group, front left (SSE-VL) Adaptations Control unit update Update control unit software. If the vehicle already has SW version A2239029930, there is another cause. Please open a TIPS case to the Body/Chassis/Entertainment inbox if the issue persists with the new software installed.

- Creaking - Squeaking - Chattering - Humming - Grinding Cause At present, there are no known noise problems with the steering column. Remedy Check surrounding area of the steering column for possible noises. Instrument panel support Steering column switch module If noise only occurs when adjusting the steering column via electric actuation please perform: 1. Disassemble bellows of steering column tube module. 2. Move steering column entirely out and entirely down. 3. Grease steering column on green-marked positions with a suitable brush (find pictures in attachment). 4. Move column up 1/4 of the way and grease again. 5. Continue until upper limit stop is reached. 6. Then move steering column adjustment in all directions from limit stop to limit stop several times to work in the grease. 7. If noise does not resolve, perform above procedure again. 8. Then move steering column adjustment in all directions from limit stop to limit stop several times to work in the grease. 9. If noise still does not resolve, please open a TIPS case. For all other noises or if the above does not resolve, create a TIPS case Body, Chassis, and Entertainment inbox. Attach a detailed description of the noise complaint, images, and a recording of the noise. A detailed description includes: Position of height and longitudinal adjustment when the noise occurs If possible, locate affected component part on steering column State any change in the noise when steering column component parts are touched (e.g. spring, etc.)

One or More PARK Sensor Activations 3. Red Ring Around Vehicle 4. "Active Parking and Parking Assist Inoperative" on Instrument Cluster 5. Cameras 6. Other Park Topics Cause Various root causes Remedy See attached diagnostic guide.

There is an implausible signal." In the quick test, there are also no other DTC's in other control units that point to or reference N80 Steering Column Control Module ("SCCM"). There is no effect on any other components or vehicle functions and it does not cause an instrument cluster light. Cause The DTC only ever occurs during initialization (initialization occurs after bus sleep). The SCCM then resets itself. Remedy 1. If the error is stored and no other control unit points to the N80 SCCM ignore and erase. Software expected in Q4 2026. 2.If the DTC is in the N80 SCCM AND the following DTC's are in N30/3 (Electronic Stability Program) and N68 (Electric Power Steering): N30/3 ESP: U071286, Steering column tube module control unit has a malfunction. There is an incorrect signal. N68 EPS: U042986, Implausible data were received from the steering column module. There is an incorrect signal. Please open a TIPS case to the Body/Chassis/Entertainment inbox.

Cause Accidental or unnoticed activation of the button to open the tailgate on the vehicle key. E.g. when stored in trouser pocket, handbag etc. Remedy As of the 6th generation, the vehicle key can be recoded so that the tailgate no longer opens as a result of a long press on the button, but by double-clicking on the button instead. This reduces the likelihood of the button being activated accidentally or unintentionally. The recoding can be carried out as follows: 1. Add SA Code O19 into VeDoc (O for Oscar, not "zero") an XSS ticket may be necessary to add the SA code 2. Perform SCN coding of EIS N73 control unit 3. Deactivate the vehicle key (a successful deactivation is indicated by the LED lighting up 2x briefly and then 1x for a long period). 4. Place the vehicle key in the storage compartment on the key symbol and turn on the ignition. All other vehicle keys must be outside of the vehicle when doing this! Perform steps 3 and 4 successively for all vehicle keys. Notes: 6th, 7th and 8th generation keys can be deactivated as follows: Up to modification year 22/1 double-click on the locking button As of modification year 22/1, by pressing and holding the locking button + double-clicking on the release tab On model series 167, the storage compartment with the key symbol is located in the armrest. The SCN coding from the EZS is only transferred correctly to the vehicle key under the following conditions: Only one vehicle key is located in the vehicle, this key has been deactivated and it is positioned on the marking in the storage compartment for the data transfer. The costs for this adaptation are to be borne by the customer.

One or More PARK Sensor Activations 3. Red Ring Around Vehicle 4. "Active Parking and Parking Assist Inoperative" on Instrument Cluster 5. Cameras 6. Other Park Topics Cause Various root causes Remedy See attached diagnostic guide.

One or More PARK Sensor Activations 3. Red Ring Around Vehicle 4. "Active Parking and Parking Assist Inoperative" on Instrument Cluster 5. Cameras 6. Other Park Topics Cause Various root causes Remedy See attached diagnostic guide.

- Creaking - Squeaking - Chattering - Humming - Grinding Cause At present, there are no known noise problems with the steering column. Remedy Check surrounding area of the steering column for possible noises. Instrument panel support Steering column switch module If noise only occurs when adjusting the steering column via electric actuation please perform: 1. Disassemble bellows of steering column tube module. 2. Move steering column entirely out and entirely down. 3. Grease steering column on green-marked positions with a suitable brush (find pictures in attachment). 4. Move column up 1/4 of the way and grease again. 5. Continue until upper limit stop is reached. 6. Then move steering column adjustment in all directions from limit stop to limit stop several times to work in the grease. 7. If noise does not resolve, perform above procedure again. 8. Then move steering column adjustment in all directions from limit stop to limit stop several times to work in the grease. 9. If noise still does not resolve, please open a TIPS case. For all other noises or if the above does not resolve, create a TIPS case Body, Chassis, and Entertainment inbox. Attach a detailed description of the noise complaint, images, and a recording of the noise. A detailed description includes: Position of height and longitudinal adjustment when the noise occurs If possible, locate affected component part on steering column State any change in the noise when steering column component parts are touched (e.g. spring, etc.)

temperatures (<10C) and the MIL activated accordingly, even though there is no corresponding high level of aging physically. In this regard, the fault code P0A7F00 "The age limit of the hybrid/high-voltage battery module has been reached" is displayed in the N127 PTCU control unit and/or A66 battery module control unit (48 V battery). Cause Faulty computation of the age limit of the 48 V battery. Remedy Step 1: Software update of A66 battery module (48 V battery) Step 2: Perform reset routine: 2.1 Read out actual value 056 in A66 control unit (age limit SOH-R) a. If SOH-R <= 125%: Delete fault memory in PTCU control unit (N127) and 48 V battery (A66). Process ended. b. If SOH-R > 125%: Drive for 60 min to add SOH-R value. 2.2 Read out actual value 056 in A66 control unit (age limit SOH-R) a. If SOH-R <= 125%: Delete fault memory in PTCU control unit (N127) and 48 V battery (A66). Process ended. b. If SOH-R > 125%: Park vehicle > 12 hours in the workshop at a warm ambient temperature > 15C, then drive for 60 min. 2.3 Read out actual value 056 in A66 control unit (age limit SOH-R) a. If SOH-R <= 125%: Delete fault memory in PTCU control unit (N127) and 48 V battery (A66). Process ended. b. If SOH-R > 125%: Create TIPS case

P0CFE00 is stored in control unit "N83 - AC charger for high-voltage battery (SG-LG)". The instrument cluster message and the FC memory entry can also appear at the beginning of the charging pause during delayed charging. Both only occur in combination with active pre-entry climate control. Cause Software in control unit "N83 - AC charger for high-voltage battery (SG-LG)". Remedy For model series 206 and 223 with code 802: Perform SCN coding in control unit "N83 - AC charger for high-voltage battery (SG-LG)". Please do not replace any parts even if the FC P0CFE00 coding continues to appear after successfully completing this step. A new software fix is currently in development and will likely be published in 01/2026. Replacing parts will not remedy the issue. For model series 243: The correction is already available. Perform a software update and SCN coding for the control units "N116/5 - Direct current charging connection unit (DCCU)" and "N83/11 - AC charger for high-voltage battery (SG-LG)" in order to remedy the problem.

P0CFE00 is stored in control unit "N83 - AC charger for high-voltage battery (SG-LG)". The fault message and the fault memory entry can also appear at the beginning of the charging pause during delayed charging. Both only occur in combination with active pre-entry climate control. Cause Software in control unit "N83 - AC charger for high-voltage battery (SG-LG)". Remedy For model series 167, 214, 254 and 223 with code 802: Perform SCN coding in control unit "N83 - AC charger for high-voltage battery (SG-LG)". Please do not replace any parts even if the FC P0CFE00 coding continues to appear after successfully completing this step. A new software is currently in development and will become available in late 01/2026. Replacing parts will not remedy the issue. For model series 243: The correction is already available. Please inform the workshop to perform a software update and SCN coding for the control units "N116/5 - Direct current charging connection unit (DCCU)" and "N83/11 - AC charger for high-voltage battery (SG-LG)" in order to remedy the problem.

One or More PARK Sensor Activations 3. Red Ring Around Vehicle 4. "Active Parking and Parking Assist Inoperative" on Instrument Cluster 5. Cameras 6. Other Park Topics Cause Various root causes Remedy See attached diagnostic guide.

CarPlay over Wi-Fi Audio cuts out Device not recognized No operation possible Cause There are multiple possible causes for an iPhone disconnecting from a vehicles head unit while using Apple CarPlay. These include hardware, software, and environmental factors: Environmental Interference: External Sources: Passing under toll bridges, driving near airports, or areas with heavy electronic interference can cause connection drops. Cellular Networks: Interference from nearby cell towers operating on similar frequencies (usually 2.4GHz or 5GHz) can disrupt the signal. Storage Location: Keeping your phone in a handbag or surrounded by other objects inside the vehicle can create physical or electronic interference. Device and Software Topics: Head Unit Software/Hardware: Hardware causes or outdated firmware in the vehicles head unit can prevent a stable connection. iPhone Software/Hardware: Similar causes in the iPhone, including outdated iOS versions or hardware causes, may affect performance. Reset or Reboot: Automatic rebooting or resetting of either the head unit or the iPhone will temporarily disrupt CarPlay. Connection and Settings: Wired Connections Cables: A compromised or poor-quality iPhone-USB cable can cause intermittent or total loss of connection. USB Ports: Dust, debris, or physical deformation in the USB port of either the head unit or the iPhone can also lead to disconnects. Wireless Connections: Intermittent Bluetooth/Wi-Fi: Unstable wireless communication (Bluetooth/Wi-Fi) can frequently break the Car- Play connection. Power Management: Battery Saver Mode: Enabling low power mode may restrict background processes, affecting CarPlay. Vehicles Electrical System: Unstable power delivery from the cars battery or electrical interruptions can cause the head unit to malfunction. Phone & App Configuration: Phone Settings: Settings (especially Bluetooth or Wi-Fi) on your iPhone can interfere with the CarPlay link. Third-Party Apps/Profiles: Installed apps or configuration profiles may conflict with CarPlays operation. Native apps are apple maps, apple music, audio books, apple news, podcasts, messages and phone. All other apps are considered third party apps. App Conflicts: Running conflicting apps that require similar system resources as CarPlay can cause instability. Mobile Data Plan: Streaming from online sources without sufficient mobile data can result in lost connectivity. Other Factors: Heat & Overheating: If either the phone or the head unit overheats, they may disable certain functions to prevent damage, leading to disconnection. User Actions: Accidentally disconnecting the device in settings, or physically moving or bumping the phone or cable, may disrupt the connection. Remedy Guided Diagnostic Path for Apple CarPlay Connection Issues Please follow the steps below to systematically diagnose and resolve CarPlay concerns: Update Devices: Ensure the iPhone is updated to the latest available iOS version. Ensure the vehicles head unit is updated to the latest software version available. Isolate the Issue: Check whether the symptom persists with another iPhone running the latest iOS version. Test both wireless and wired CarPlay connections: Does the issue only occur with wireless CarPlay? Does the wired connection to the phone function correctly? Further Troubleshooting Steps: Reboot the iPhone. Reboot the head unit via the settings menu (user data reset). Remove saved CarPlay connections Delete the head unit information from the iPhone (see attached video for guidance). Delete the iPhone from the head units list of paired devices. Remove the head unit entry from CarPlay settings on the iPhone. Re-initiate pairing between the head unit and the iPhone to establish a new connection certificate. See attachment for complete text.

Cause The XENTRY battery tester uses the stored on-board electrical system data in the SAM module to access the health of the 12 volt battery. The XENTRY battery test may not take into account a single discharge event because the SAM or EZS cannot record the data if the battery is discharged. Note: A discharged battery does not necessarily need to be replaced. A discharged battery may be recovered with no permanent damage. Remedy 1) If the battery is discharged, charge the battery. Review WS54.00-P-0037B for minimum charger specifications. Note the amperage difference between trickle (maintainer) chargers of at least 16A and quick chargers of at least 30A. Review AP54.10-P-5449U. Note when battery is sufficiently charged the charger current is less 5A. 2) While charging the battery, analyze the vehicle data to determine root cause of discharge using the following data points: NOTE: For guidance on use of the on-board electrical data please review the AKUBIS video titled "New onboard electrical system diagnosis shown on BR 166". The video can be accessed through WIS by following the path WSM--> content by model series --> passenger cars --> ML-Class --> Model 166 --> group 54 --> New onboard electrical system diagnosis. Refer to the March 2023 PCTT for the video walkthrough of analysis as well as the attachment of the slides to this Li. Review GF54.10-P-1012A regarding what can cause deep discharge protection to not end a battery draw. Review SI54.10-P-0024A for proper maintenance of the vehicle. For Star 2 vehicles: -Review FSAM on-board electrical data conspicuous records NOTE: This data can be found via FSAM N10/6 -> Actual Values -> On-board electrical system -> On-board electrical system data For Star 3 vehicles: -Review N73/3 EZS on-board electrical data conspicuous records NOTE: This data can be found via EZS N73/3 -> Actual Values -> On-board electrical system -> On-board electrical system data 3) Determine if root cause is due to: vehicle technical issue? customer behavior? NOTE: Recommend using battery analysis sheet found in XiW -> Local Contents -> Diagnostic info -> Battery Discharge Worksheet 4) If battery still does not accept charge AND the vehicle does not fall within the parameters of improper maintenance, then create a TIPS case. *IMPORTANT* - If the improper maintenance/use is found during diagnosis, DO NOT open a TIPS case. If a TIPS case is opened, it will be marked 1 star and directed to your assigned FSE for review. TIPS Case must include with the case: Amperage setting of charger and time battery was on charger XENTRY Battery Tester results Voltage of battery taken with multimeter: Do not connect charger while taking measurements N10/6 FSAM, (N73 or N73/3) and (N73*1 or N73/3*1) Workshop analysis of conspicuous data Root cause analysis for battery discharge based on the above documents (technical, customer, etc.) NOTE: For expedited results when creating a case write customer complaint as "XENTRY Battery Tester implausible".

reduced range of functions" in relation to "FC151E29- The level sensor at front left has a malfunction. There is an invalid signal" in the control unit HLI/LED headlamp range adjustment front left. (HLI_FL223 HW: A2239017717/ HWVersion: 23.11.00) Cause Electronic interference occurring at the sensor level of the front axle. Remedy Update of the HLI/LED headlamp range adjustment control units. Note: First update control unit for HLI/LED headlamp range adjustment on FRONT LEFT to latest software. Then update control unit for HLI/LED headlamp range adjustment on front right to latest software.

software for the Mobile Access Unit (MAU) control unit may not correspond to the current series production configuration. This OTA software update for the Digital Vehicle Key (DVK) function within the MAU will improve battery management by disconnecting the vehicle network when it is not required. In addition, the software update contains general improvements for system stability and DVK device compatibility. Remedy MBUSA will conduct an OTA service campaign. Remote software updates are automatically downloaded and installed in the customers vehicle free of charge and do not require a dealer visit.

To verify the supplier and software number of the steering column module. See attachment "Supplier Identification" for assistance. Cause MRSM/SCCM flashed to SW A2239028729 Remedy Please send VIN specific ID1 Support Package online using the XENTRY Kit used during the time the error occurred. Then, create an XSS ticket using the Support Tool icon under XENTRY Diagnosis.

Cause Radiator shell illuminated with LED modules partially (one side of the illuminated radiator shell lights up darker) or completely inoperative (radiator shell does not illuminate). Remedy Please create a TIPS case with photos of the issue and send to the Body/Chassis/Entertainment inbox. The damaged part may be required for further analysis.

CarPlay over Wi-Fi Audio cuts out Device not recognized No operation possible Cause There are multiple possible causes for an iPhone disconnecting from a vehicles head unit while using Apple CarPlay. These include hardware, software, and environmental factors: Environmental Interference: External Sources: Passing under toll bridges, driving near airports, or areas with heavy electronic interference can cause connection drops. Cellular Networks: Interference from nearby cell towers operating on similar frequencies (usually 2.4GHz or 5GHz) can disrupt the signal. Storage Location: Keeping your phone in a handbag or surrounded by other objects inside the vehicle can create physical or electronic interference. Device and Software Topics: Head Unit Software/Hardware: Hardware causes or outdated firmware in the vehicles head unit can prevent a stable connection. iPhone Software/Hardware: Similar causes in the iPhone, including outdated iOS versions or hardware causes, may affect performance. Reset or Reboot: Automatic rebooting or resetting of either the head unit or the iPhone will temporarily disrupt CarPlay. Connection and Settings: Wired Connections: Cables: A compromised or poor-quality iPhone-USB cable can cause intermittent or total loss of connection. USB Ports: Dust, debris, or physical deformation in the USB port of either the head unit or the iPhone can also lead to disconnects. Wireless Connections: Intermittent Bluetooth/Wi-Fi: Unstable wireless communication (Bluetooth/Wi-Fi) can frequently break the Car- Play connection. Power Management: Battery Saver Mode: Enabling low power mode may restrict background processes, affecting CarPlay. Vehicles Electrical System: Unstable power delivery from the cars battery or electrical interruptions can cause the head unit to malfunction. Phone & App Configuration: Phone Settings: Settings (especially Bluetooth or Wi-Fi) on your iPhone can interfere with the CarPlay link. Third-Party Apps/Profiles: Installed apps or configuration profiles may conflict with CarPlays operation. Native apps are apple maps, apple music, audio books, apple news, podcasts, messages and phone. All other apps are considered third party apps. App Conflicts: Running conflicting apps that require similar system resources as CarPlay can cause instability. Mobile Data Plan: Streaming from online sources without sufficient mobile data can result in lost connectivity. Other Factors: Heat & Overheating: If either the phone or the head unit overheats, they may disable certain functions to prevent damage, leading to disconnection. User Actions: Accidentally disconnecting the device in settings, or physically moving or bumping the phone or cable, may disrupt the connection. Remedy Guided Diagnostic Path for Apple CarPlay Connection Issues Please follow the steps below to systematically diagnose and resolve CarPlay concerns: Update Devices: Ensure the iPhone is updated to the latest available iOS version. Ensure the vehicles head unit is updated to the latest software version available. Isolate the Issue: Check whether the symptom persists with another iPhone running the latest iOS version. Test both wireless and wired CarPlay connections: Does the issue only occur with wireless CarPlay? Does the wired connection to the phone function correctly? Further Troubleshooting Steps: Reboot the iPhone. Reboot the head unit via the settings menu (user data reset). Remove saved CarPlay connections Delete the head unit information from the iPhone (see attached video for guidance). Delete the iPhone from the head units list of paired devices. Remove the head unit entry from CarPlay settings on the iPhone. Re-initiate pairing between the head unit and the iPhone to establish a new connection certificate Please see attachment for further details

Commonly used acronyms in LI's and TIPS cases. Control unit names, numbers, and how to identify. Network/wiring architecture groups to baumuster quick reference. Platform to baumuster quick reference. Cause Information only Remedy Acronyms: AV = Actual Values CU = Control Unit CUL = Control Unit Log DTC = Diagnostic Trouble Code E-Stand = Fresh-up head unit boot software (found in head unit control unit log) FUP = Fresh-up FW = Firmware HSVL = High Speed Video Line HU = Head Unit HW = Hardware IPD = Injector Performance Data ISU = Initial Start Up LVDS = Low Voltage Differential Signal NSFT = Not Safe For Transport MOPF = Model Facelift (Ex: 167 MOPF) PiH = Plug-in Hybrid P3 Hybrid = AMG Plug-in Hybrid with rear drive unit SA Code = Sonderausstattungscode (Option Code) SCN = Software Calibration Number SW = Software TCU = Telecommunication Control Unit (Hermes/Ramses/Etc...) QT = Quicktest XD = XENTRY Diagnosis Control Unit Identification: Refer to the attachment "Control Unit Nomenclature" for location of each. Control Unit Name Control Unit Number Control Unit Short name Control Unit Diogenes ("dy-oj-uh-neez") name - Control unit variant/family. Network/Wiring Architecture to Baumuster Quick Reference: MFA = "Mercedes-Benz Frontwheel Architecture" 117 156 246 MFA2 = "Mercedes-Benz Frontwheel Architecture - Generation 2" 118 177 243 247 EVA1.5 = "Electric Vehicle Architecture" 243 EVA2 = "Electric Vehicle Architecture - Generation 2" 294 295 296 297 MSA = "Mercedes-Benz Sport Architecture" 192 232 MMA = "Mercedes-Benz Modular Architecture" 174 Star 1 117, 156, 246 (MFA) 166, 176, 221, 242, 246, 292 Star 2 205, 213, 238, 253, 257, 290 (MRA) 117, 156, 246 (MFA) 118, 177, 243, 247 (MFA2) 167, 222, 292, 463, 465, 906 Star 3 294, 295, 296, 297 (EVA2) 206, 214, 223, 236, 254 (MRA2) 192 and 232 (MSA) 907 Platform to Baumuster Quick Reference: MRA = "Mercedes-Benz Rearwheel Architecture": 205 213 222 238 253 257 290 MRA2 = "Mercedes-Benz Rearwheel Architecture - Generation 2": 206 214 223 236 254 MFA = "Mercedes-Benz Frontwheel Architecture" 117 156 246 MFA2 = "Mercedes-Benz Frontwheel Architecture - Generation 2" 118 177 243 247 EVA1.5 = "Electric Vehicle Architecture" 243 EVA2 = "Electric Vehicle Architecture - Generation 2" 294 295 296 297 MSA = "Mercedes-Benz Sport Architecture" 192 232 MMA = "Mercedes-Benz Modular Architecture" 174

reduced range of functions" in relation to "FC151E29- The level sensor at front left has a malfunction. There is an invalid signal" in the HLI control unit. Cause HLI control units processing of level sensor data. Remedy Update the software for the HLI control units - starting with the left controller. After the updates, perform SCN coding of the EZS. Please ensure that the SW with the A item number A2239027738 (or newer) is used. Parts replacements will not resolve complaint. Do not replace parts. If concern is not resolved by software, please open a TIPS case and send to the Body/Chassis/Entertainment inbox. Concern does not impact drivability of the vehicle or the function of the headlights.

reduced range of functions" in relation to "FC151E29- The level sensor at front left has a malfunction. There is an invalid signal" in the HLI control unit. Cause HLI control units processing of level sensor data. Remedy Update the software for the HLI control units - starting with the left (driver side) controller. After the updates, perform SCN coding of the EZS. Parts replacements will not resolve complaint. Do not replace parts. If concern is not resolved by software, please open a TIPS case and send to the Body/Chassis/Entertainment inbox. Concern does not impact drivability of the vehicle or the function of the headlights.

coding for the electronic ignition lock control unit does not correspond to the latest series production configuration. The electronic ignition lock control unit will be updated to change the logic for locking and unlocking the vehicle via the door handles. To unlock the vehicle, the large outer contact surface of the door handle must be touched. To lock the vehicle, the small, recessed contact surface of the door handle must be touched. MBUSA will conduct an OTA service campaign. Remote software updates are automatically downloaded and installed in the customers vehicle free of charge and do not require a dealer visit.

Cause The XENTRY battery tester uses the stored on-board electrical system data in the SAM module to access the health of the 12 volt battery. The XENTRY battery test may not take into account a single discharge event because the SAM or EZS cannot record the data if the battery is discharged. Note: A discharged battery does not necessarily need to be replaced. A discharged battery may be recovered with no permanent damage. Remedy 1) If the battery is discharged, charge the battery. Review WS54.00-P-0037B for minimum charger specifications. Note the amperage difference between trickle (maintainer) chargers of at least 16A and quick chargers of at least 30A. Review AP54.10-P-5449U. Note when battery is sufficiently charged the charger current is less 5A. 2) While charging the battery, analyze the vehicle data to determine root cause of discharge using the following data points: NOTE: For guidance on use of the on-board electrical data please review the AKUBIS video titled "New onboard electrical system diagnosis shown on BR 166". The video can be accessed through WIS by following the path WSM--> content by model series --> passenger cars --> ML-Class --> Model 166 --> group 54 --> New onboard electrical system diagnosis. Refer to the March 2023 PCTT for the video walkthrough of analysis as well as the attachment of the slides to this Li. For Star 2 vehicles: -Review FSAM on-board electrical data conspicuous records NOTE: This data can be found via FSAM N10/6 -> Actual Values -> On-board electrical system -> On-board electrical system data For Star 3 vehicles: -Review N73/3 EZS on-board electrical data conspicuous records NOTE: This data can be found via EZS N73/3 -> Actual Values -> On-board electrical system -> On-board electrical system data 3) Determine if root cause is due to: vehicle technical issue? customer behavior? NOTE: Recommend using battery analysis sheet found in XiW -> Local Contents -> Diagnostic info -> Battery Discharge Worksheet 4) If battery still does not accept charge, create a TIPS case. -Must include with the case: Amperage setting of charger and time battery was on charger XENTRY Battery Tester results Voltage of battery taken with multimeter: Do not connect charger while taking measurements N10/6 FSAM and N73/3 EZS CUL Workshop analysis of conspicuous data Root cause analysis for battery discharge based on the above documents (technical, customer, etc.) NOTE: For expedited results when creating a case write customer complaint as "XENTRY Battery Tester implausible".

"Active Emergency Stop Assist not available" "Active Lane Keeping Assist not available" Cause Possible causes: the hand detection mat, the hand detection control unit, the contacts and the steering wheel harness. Remedy In the event of a customer complaint and fault code in IDC control unit: U186B29 in IDC223 or fault code U0429E0, U042941, U042929, U042902, U0429E1 in IDC213 or fault code in HOSWD control unit: B1E7614 Test: Please perform the new SCN coding for HOSWD control unit (N179/1) (available since May 2025). Please flash the IDC (N62/4) software A223 902 75 37 (only applies to HOSWD223). Erase fault memory Remedy: Switch on ignition without touching the steering wheel. If after 10 seconds without touching the steering wheel, one of the two fault messages appears in the IC: Please check contacts and feed lines in the steering wheel by means of visual inspection for damage, crimped connections, loose connections, etc. (example in picture 2 and 3). If there is visible damage -> replace steering wheel electronics or feed lines. If there is no visible damage -> Please create TIPS case! If no yellow message appears in the instrument cluster within 10 seconds: Please grab the steering wheel all the way round, including the 6 o'clock chrome molding, with both hands (see picture 1). If the fault is triggered by grabbing the steering wheel rim or pressing on the 6 o'clock clasp, check contacts and feed lines in the steering wheel by means of visual inspection for damage, crimped connections, loose connections, etc. (example in picture 2 and 3). Check ground connections (screw connections and cable to steering wheel rim); if necessary tighten screws/bolts and check for corrosion (Picture 4). If there is visible damage -> replace steering wheel electronics or feed lines. If no fault is visible: Please open a TIPS case! In the event of a customer complaint and further fault code in HOSWD: B1E7713: Check ground connections (screw connections and cable to steering wheel rim); if necessary tighten screws/bolts and check for corrosion (Picture 4). B1F1F04: Check hand detection system control unit; if necessary swap with donor vehicle (ensure that the HW part numbers are identical).

Cause Enhanced technical support process for CIVIC modules and associated displays Remedy Note: Do not replace any components. For all symptoms concerning CIVIC and displays create a TIPS case after performing initial diagnosis. Attach the following documents to this case: Quick test Control unit logs for CIVIC and all displays If possible, obtain customer consent for CIVIC logging that needs to be reviewed by GSP (see attachment). In some instances the CIVIC logs may not be required. After receiving the case if it is determined that CIVIC logging is required, a password will be generated for activation of the CIVIC logging (where the customer has approved this). This password and Xentry instruction on how to create a log will be communicated in the TIPS case. The password is case sensitive and only valid for 24 hours. Note: If unable to obtain the customer approval for CIVIC logging, simply state so in the TIPS case notes.

Cause Temperature sensor in overhead control panel (OCP) delivering incorrect values: The temperature sensor in the overhead control panel is malfunctioning. Fault code B110709 or fault code B11F697 are present in the overhead control panel with the status (active) or (active stored). or The temperature sensor in the overhead control panel measures an incorrect temperature (the temperature value can be checked against the actual value in the overhead control panel) If the above-mentioned fault code is not present, the cause could be malfunction on the air conditioning system. Remedy If one of the above-mentioned fault codes should occur, a TIPS case must be created here. If the above fault codes or actual value differences are present in the OCP - please send the case to the Body/Chassis/ Entertainment inbox. Otherwise, the case must be sent to the HV/LV inbox for support in A/C diagnosis. *** It is not necessary to replace the overhead control panel ***

reduced range of functions" in relation to "FC151E29- The level sensor at front left has a malfunction. There is an invalid signal" in the control unit HLI/LED headlamp range adjustment front left. Cause Electronic interference occurring at the sensor level of the front axle. Remedy Update of the HLI/LED headlamp range adjustment control units.

mobile device connection control unit software does not correspond to current production specifications. The mobile device connection control unit will receive an over-the-air (OTA) software update which improves general system stability and device compatibility for the Digital Vehicle Key functionality. The update is downloaded in the background and the customer will be prompted to accept or decline installation during the following ignition cycle. MBUSA will conduct an OTA service campaign. Remote software updates are automatically downloaded and installed in the customers vehicle free of charge and do not require a dealer visit.

The software for the communication module does not correspond to the latest series production configuration. The communication module will receive an OTA update. The update is downloaded and installed in the background. During installation, the system can be used without restrictions. The new software will become active after the vehicle has been restarted. Remedy MBUSA will conduct an OTA service campaign. Remote software updates are automatically downloaded and installed in the customers vehicle free of charge and do not require a dealer visit.

communication software does not correspond with the latest series production configuration. The communication module will receive an OTA update which includes quality-enhancing optimizations and improves the system stability and accessibility of Mercedes me services. The update is downloaded and installed in the background. During installation, the system can be used without restrictions. The new software will become active after the vehicle has been restarted. Remedy MBUSA will conduct an OTA service campaign. Remote software updates are automatically downloaded and installed in the customers vehicle free of charge and do not require a dealer visit.

communication software does not correspond with the latest series production configuration. The communication module will receive an OTA update which includes quality-enhancing optimizations and improves the system stability and accessibility of Mercedes me services. The update is downloaded and installed in the background. During installation, the system can be used without restrictions. The new software will become active after the vehicle has been restarted. Remedy MBUSA will conduct an OTA service campaign. Remote software updates are automatically downloaded and installed in the customers vehicle free of charge and do not require a dealer visit.

Cause The problem was caused by a software error in the control unit N10/8 (Rear SAM). Remedy Software update to the control unit N10/8 (Rear SAM - Signal acquisition and actuation module rear control unit).

Cause Accidental or unnoticed activation of the button to open the tailgate on the vehicle key. E.g. when stored in trouser pocket, handbag etc. Remedy As of the 6th generation, the vehicle key can be recoded so that the tailgate no longer opens as a result of a long press on the button, but by double-clicking on the button instead. This reduces the likelihood of the button being activated accidentally or unintentionally. The recoding can be carried out as follows: 1. Enter AO Code O19 into VeDoc (O for Oscar, not "zero") 2. EZS N73: Perform SCN coding 3. Deactivate the vehicle key (a successful deactivation is indicated by the LED lighting up 2x briefly and then 1x for a long period). 4. Place the vehicle key on the key symbol in the storage compartment and then switch on the ignition. All other vehicle keys must be outside of the vehicle when doing this! Perform steps 3 and 4 successively for all vehicle keys. Notes: 6th, 7th and 8th generation keys can be deactivated as follows: Up to modification year 22/1 double-click on the locking button As of modification year 22/1, by pressing and holding the locking button + double-clicking on the release tab On model series 167, the storage compartment with the key symbol is located in the armrest. The SCN coding from the EZS is only transferred correctly to the vehicle key under the following conditions: Only one vehicle key is located in the vehicle, this key has been deactivated and it is positioned on the marking in the storage compartment for the data transfer. The costs for this adaptation are to be borne by the customer.

CLA, CLS, E-Class, G-Class, GLA, GLB, GLC, GT, and S-Class (118, 177, 205, 213, 217, 222, 238, 247, 253, 257, 290, 463 platform) vehicles, the communication software does not correspond with the latest series production configuration. The communication module will receive an OTA update which includes quality-enhancing optimizations and improves the system stability and accessibility of Mercedes me services. The update is downloaded and installed in the background. During installation, the system can be used without restrictions. The new software will become active after the vehicle has been restarted. MBUSA will conduct an OTA service campaign. Remote software updates are automatically downloaded and installed in the customers vehicle free of charge and do not require a dealer visit. No customer letter will be mailed for this OTA software update. Parts Parts are not required

Commonly used acronyms in LI's and TIPS cases. Control unit names, numbers, and how to identify. Network/wiring architecture groups to baumuster quick reference. Platform to baumuster quick reference. Cause Information only Remedy Acronyms: AV = Actual Values CU = Control Unit CUL = Control Unit Log DTC = Diagnostic Trouble Code E-Stand = Fresh-up head unit boot software (found in head unit control unit log) FUP = Fresh-up FW = Firmware HSVL = High Speed Video Line HU = Head Unit HW = Hardware ISU = Initial Start Up LVDS = Low Voltage Differential Signal NSFT = Not Safe For Transport MOPF = Model Facelift (Ex: 167 MOPF) PiH = Plug-in Hybrid P3 Hybrid = AMG Plug-in Hybrid with rear drive unit SA Code = Sonderausstattungscode (Option Code) SCN = Software Calibration Number SW = Software TCU = Telecommunication Control Unit (Hermes/Ramses/Etc...) QT = Quicktest XD = XENTRY Diagnosis Control Unit Identification: Refer to the attachment "Control Unit Nomenclature" for location of each. Control Unit Name Control Unit Number Control Unit Short name Control Unit Diogenes ("dy-oj-uh-neez") name - Control unit variant/family. Network/Wiring Architecture to Baumuster Quick Reference: Star 1 117, 156, 246 (MFA) 166, 176, 221, 242, 246, 292 Star 2 205, 213, 238, 253, 257, 290 (MRA) 117, 156, 246 (MFA) 118, 177, 243, 247 (MFA2) 167, 222, 292, 463, 465, 906 Star 3 294, 295, 296, 297 (EVA2) 206, 214, 223, 236, 254 (MRA2) 192 and 232 (MSA) 907 Platform to Baumuster Quick Reference: MRA = "Mercedes-Benz Rearwheel Architecture": 205 213 222 238 253 257 290 MRA2 = "Mercedes-Benz Rearwheel Architecture - Generation 2": 206 214 223 236 254 MFA = "Mercedes-Benz Frontwheel Architecture" 117 156 246 MFA2 = "Mercedes-Benz Frontwheel Architecture - Generation 2" 118 177 243 247 EVA1.5 = "Electric Vehicle Architecture" 243 EVA2 = "Electric Vehicle Architecture - Generation 2" 294 295 296 297 MSA = "Mercedes-Benz Sport Architecture" 192 232 MMA = "Mercedes-Benz Modular Architecture" No vehicles currently launched.

"Active Emergency Stop Assist not available" "Active Lane Keeping Assist not available" Cause Possible causes: the hand detection mat, the hand detection control unit, the contacts and the steering wheel harness. Remedy Test Procedure: Perform an initial quick test with freeze frame data. Save the N179 - Hand detection system (HE) and N62/4 - Driver assistance system (SG-FAS) control unit logs. Note the fault frequency of fault codes set. Delete the N179 and N62/4 fault memory. Using both hands, "scan" the steering wheel all the way round, including the chrome molding at 6 o'clock (see Picture 1). Read out fault memory and follow steps below for any faults set. Remedy: Vehicles with control unit N179 - Hand detection system (HE): B1E7614: Check contacts and wiring harness in steering wheel by carrying out a visual check for damage, pinched areas, loose connections, etc. (examples in Figs. 2 and 3); If no damage is noted replace the N135 - Steering wheel electronics (LRE) and reassess. If fault code returns replace the steering wheel. B1E7713: Please check the wires and connections in the steering wheel. Afterwards, please check whether the complaint is caused by over torqued screws on steering wheel trim pieces. To do this, please loosen the screws slightly and reevaluate the situation. (Picture 4). P164456: Perform SCN coding. P1CA000: Perform an initial start-up on the N179 hand detection control unit. Faults in N62/4 - Driver assistance system (SG-FAS) control unit with U186B29, U0429E0, U042941, U042929, U042902, U0429E1: If no fault is stored in the N179 control unit: Scan steering wheel as indicated in the test procedure and check whether the fault is reproducible. If no fault code is stored in the hand detection control unit, the fault codes in the driver assistance systems control unit are precautionary messages. Software for the N62/4 - Driver assistance system (SG-FAS) is now available for Star 3 vehicles only. Fault in IDC223 control unit: U186B29: Delete fault memory and flash the new IDC (N62/4) software A223 902 75 37. If the software update is not available, or the problem persists, create a TIPS case. Fault in IDC213 control unit: U0429E0, U042941, U042929, U042902, U0429E1: If no fault is stored in the HOSWD control unit then scan the steering wheel and check whether the fault is reproducible. If reproducible: Create a TIPS case, adding the note "reproducible". If no fault code is stored in the hand detection control unit, the fault codes in the driver assistance systems control unit are precautionary messages. New coding parameters (SCN) will be available in Q2/2025 for the HOSWD control unit.

Please note that if the complaint "Fuel filler flap not opening" occurs, it is important to check the fuel filler flap before replacing the central locking actuator. For gasoline hybrid vehicles where the fuel filler flap fails to open or does so but slowly, observe the document "Fuel filler flap fails to open or does so but slowly on plug-in HYBRID gasoline vehicles"! Cause Central locking actuator may have an electrical fault and may not open. Remedy 1. Car locked: To rule out incorrect operation, operate the fuel filler flap in the area shown in Fig. 1 and listen out for the clicking noise of the microswitch in the central locking actuator. If no clicking can be heard, continue with point 4. 2. Car unlocked: Press area on flap to start the microswitch clicking. Flap opens - show the customer the area to press. 3. Car unlocked: Flap cannot be opened regardless of which area you press. Open the flap by operating the emergency release for the CL actuator (through trunk, fender gap cover, etc, depending on specific vehicle) 4. Central locking actuator pressed directly, no clicking of microswitch, no electrical release of central locking actuator => Clicking of microswitch, electrical release of central locking actuator => Tank filler recess/charging recess not OK; report results via a TIPS case to B/C/E Inbox. 5. Replace central locking actuator; check function of new part before installing it: Do not dispose of damaged part. New central locking actuator does not release: More detailed examination of connector coupling, wiring harness, electrics required.

temperatures (<50F) and the MIL activated accordingly, even though there is no corresponding high level of aging physically. In this regard, the fault code P0A7F00 "The age limit of the hybrid/high-voltage battery module has been reached" is displayed in the N127 PTCU control unit and/or A66 battery module control unit (48 V battery). Cause Faulty computation of the age limit of the 48 V battery. Remedy Do not replace any parts!! Step 1: Perform the software update of A66 battery module (48 V battery) After SW has been updated, perform the following reset procedure: Step 1: Read the State of Health Resistance - (SOH-R) Step 2: If SOH-R <=125%: Clear fault memory in PTCU(N127) and 48V battery (A66). Procedure finished. If SOH > 125%: Drive for a duration of 60 minutes to retrain the SOH-R value. Step 3: Read the State of Health Resistance - (SOH-R) If SOH-R <=125%: Clear fault memory in PTCU(N127) and 48V battery (A66). Procedure finished. If SOH > 125%: Park vehicle in Workshop for >12 hours in warm ambient temperature >60F, afterwards drive for a duration of 60 minutes. Step 4: Read the State of Health Resistance - (SOH-R) If SOH-R <=125%: Clear fault memory in PTCU(N127) and 48V battery (A66). Procedure finished. If SOH-R is still >125%, open a TIPS case.

Cause Enhanced technical support process for CIVIC modules and associated displays Remedy Note: Do not replace any components. For all symptoms concerning CIVIC and displays create a TIPS case after performing initial diagnosis. Attach the following documents to this case: Quick test Control unit logs for CIVIC and all displays If possible, obtain customer consent for CIVIC logging that needs to be reviewed by GSP (see attachment). In some instances the CIVIC logs may not be required. After receiving the case if it is determined that CIVIC logging is required, a password will be generated for activation of the CIVIC logging (where the customer has approved this). This password and Xentry instruction on how to create a log will be communicated in the TIPS case. The password is case sensitive and only valid for 24 hours. Note: If unable to obtain the customer approval for CIVIC logging simply state so in the TIPS case notes.

implausible (> < 365 days) for the following conditions: for the date of the vehicle handover or the last conducted and confirmed Service A/B Cause The following conditions can occur on vehicles with a disconnected on-board electrical system battery (12V/48V): The period in which the on-board electrical system battery is disconnected cannot be counted by the maintenance computer. As soon as the on-board electrical system battery is connected again, the maintenance computer automatically starts counting without making a correction to the remaining time (days to next due service). Remedy Allowance must be made for vehicles with disconnected on-board electrical system battery. The following process must be complied with to achieve a correct calculation: (A): The number of days from the "day of vehicle handover or the last conducted Service A/B" onward up to the "day on which the vehicle arrived at the workshop". (B): Remaining time (days to next due service date shown on instrument cluster). (C): Days on which the on-board electrical system battery was disconnected. The formula requires the following condition to be complied with. 365 - (A) [days] = (B) - (C) [days] If the on-board electrical system battery (12 V/48 V) was not disconnected and the remaining time shown on the instrument cluster in the customer or workshop menu (days to next due service) is implausible with regard to the date of the vehicle handover or the last conducted and confirmed service A/B, or the condition in the formula was not complied with, the service can nevertheless be conducted and confirmed. A TIPS case should only be created if the vehicle is more than 90 days over the actual service due date. In these cases, attach the control unit logs from the instrument cluster, PTCU and electronic ignition lock as well as a quick test.

"Active Emergency Stop Assist not available" "Active Lane Keeping Assist not available" Cause Possible causes: the hand detection mat, the hand detection control unit, the contacts and the steering wheel harness. Remedy Test Procedure: Perform an initial quick test with freeze frame data. Save the N179 - Hand detection system (HE) and N62/4 - Driver assistance system (SG-FAS) control unit logs. Note the fault frequency of fault codes set. Delete the N179 and N62/4 fault memory. Using both hands, "scan" the steering wheel all the way round, including the chrome molding at 6 o'clock (see Picture 1). Read out fault memory and follow steps below for any faults set. Remedy: Vehicles with control unit N179 - Hand detection system (HE): B1E7614: Check contacts and wiring harness in steering wheel by carrying out a visual check for damage, pinched areas, loose connections, etc. (examples in Figs. 2 and 3); If no damage is noted replace the N135 - Steering wheel electronics (LRE) and reassess. If fault code returns replace the steering wheel. B1E7713: Please check the wires and connections in the steering wheel. Afterwards, please check whether the complaint is caused by over torqued screws on steering wheel trim pieces. To do this, please loosen the screws slightly and reevaluate the situation. (Picture 4). P164456: Perform SCN coding. P1CA000: Perform an initial start-up on the N179 hand detection control unit. Faults in N62/4 - Driver assistance system (SG-FAS) control unit with U186B29, U0429E0, U042941, U042929, U042902, U0429E1: If no fault is stored in the N179 control unit: Scan steering wheel as indicated in the test procedure and check whether the fault is reproducible. If no fault code is stored in the hand detection control unit, the fault codes in the driver assistance systems control unit are precautionary messages. Software for the N62/4 - Driver assistance system (SG-FAS) is now available for Star 3 vehicles only. Fault in IDC223 control unit: U186B29: Delete fault memory and flash the new IDC (N62/4) software A223 902 75 37. If the software update is not available, or the problem persists, create a TIPS case.

reduced range of functions" in relation to "FC151E29- The level sensor at front left has a malfunction. There is an invalid signal" in the HLI control unit. Cause HLI control units processing of level sensor data. Remedy Software fix under development. LI will be updated upon release. Parts replacements will not resolve complaint. Do not replace parts. Concern does not impact drivability of the vehicle.

temperatures (<50F) and the MIL activated accordingly, even though there is no corresponding high level of aging physically. In this regard, the fault code P0A7F00 "The age limit of the hybrid/high-voltage battery module has been reached" is displayed in the N127 PTCU control unit and/or A66 battery module control unit (48 V battery). Cause Faulty computation of the age limit of the 48 V battery. Remedy Do not replace any parts!! Step 1: Perform the software update of A66 battery module (48 V battery) After SW has been updated, perform the following reset procedure: Step 1: Read the State of Health Resistance - (SOH-R) Step 2: If SOH-R <=125%: Clear fault memory in PTCU(N127) and 48V battery (A66). Procedure finished. If SOH > 125%: Drive for a duration of 60 minutes to retrain the SOH-R value. Step 3: Read the State of Health Resistance - (SOH-R) If SOH-R <=125%: Clear fault memory in PTCU(N127) and 48V battery (A66). Procedure finished. If SOH > 125%: Park vehicle in Workshop for >12 hours in warm ambient temperature >60F, afterwards drive for a duration of 60 minutes. Step 4: Read the State of Health Resistance - (SOH-R) If SOH-R <=125%: Clear fault memory in PTCU(N127) and 48V battery (A66). Procedure finished. If SOH-R is still >125%, open a TIPS case.

(figure 1) On the abovementioned vehicles with a mileage up to 15,000 km (about 9,300 mi), noises can occur from the rear axle differential. Cause Drivetrain resonance caused by the gear mesh of the ring and pinion in the rear axle differential in combination with installed damper elements on the axle shafts. Remedy For precise noise analysis and localization, use the chassis ear/NVH kit and the following driving procedure: 1. Drive the vehicle in a tight circle with the steering at full lock in both clockwise and counter clockwise directions. Vary engine load during the maneuvers If a foghornlike noise occurs comparable to the reference video, the vehicle exhibits the condition If the noise is present: 1. Add 15 ml of additive (Friction Modifier) into the rear axle differential via the filler plug IMPORTANT NOTE: Do NOT use Friction Modifier in vehicles equipped with an electronically controlled locking differential (Code 467). 2. Tighten the filler plug 3. Drive the vehicle until the rear axle differential reaches operating temperature Note: Proper activation of the additive requires elevated oil temperatures After the test drive to operating temperature, evaluate the noise when the rear axle is cold and when warm. If the noise is no longer present: The issue is resolved and the vehicle can be released. If there is noticeable improvement: The vehicle can be released with the explanation that the noise will gradually disappear over an extended driving distance. If the noise is still present and remains unchanged: Replace the rear axle differential.

Remedy Check the compressor's index and part number Figure 1 against Table 1. If listed please perform the following: 1. Replace the compressor, drier, and expansion valve using the applicable WIS instructions. 2. Flush the system using the applicable WIS instructions.

pre-collision occupant protection system. The task of the system is to provide additional protection to vehicle occupants when there is a risk of a side impact. It is not a restraint system component in the conventional sense and does not contain an detonator. A potential side-impact situation is detected by radar sensors. If the system detects an existing likelihood of a side impact, a reversible air cushion in the outer seat side bolster is briefly inflated by opening a valve. The resulting pulse preemptively increases the distance between the door and the occupant in order to move the occupant out of the danger zone. If the system has been activated, the following message appears on the instrument cluster: PRE-SAFE Side Impulse inoperative. See Operator's Manual. Note: After system activation, diagnostic entry B1B3713 or B1B3813 is marked as active and stored in the ORC223 (N2/5) control unit. Cause After activation of the PRE-SAFE Side Impulse system, the function is no longer available. Remedy Please check the tight seating and possible damage of the radar sensors B29/11 or B29/12. Then replace the gas generator on the affected side (R12/65 or R12/66). After replacing the gas generator (R12/65 or R12/66), please perform commissioning and SCN coding of the radar sensors B29/11 or B29/12 to ensure they are up to date. Note: In principle, it is not necessary to replace the air cushion in the "PRE-SAFE Side Impulse" system, as it is designed for multiple activations (up to 10). Exception: After deployment of the sidebag (e.g., following a crash), exchange (air cushion with gas generator) of the "PRE-SAFE Impulse Side" is required in all cases.

Large play in the rear axle steering. Cause Diverse functional play in the rear axle steering. Remedy 1. Detach underfloor paneling under rear axle steering. 2. Unscrew both holders of the rear muffler on the exhaust system and lower the rear muffler 3. Remove heat shield. 4. Remove large clamps from left bellows. 5. Slide bellows to side. The bellows can be pulled outwards to work on the screw-on stud. 6. A second person sits in the vehicle and, with the drive activated and the automatic transmission in the N position, turns the steering to left lock. Caution! Risk of trapping when steering at the same time! Do not move steering wheel during operation steps 7 and 8! 7. Clean screw-on stud of any grease using a clean, lint-free rag. => Up to the area where the stud enters the bearing! Then completely degrease the threaded stud using a lint-free cloth soaked in a suitable assembly cleaner (e.g., A 000 986 56 01); if necessary, clean hard-to-reach areas with the assembly cleaner. => Up to the area where the stud enters the bearing! Important:The surface must be thoroughly cleaned and free of grease! 8. Then apply Hylomar (A 001 989 25 20 09) all around to the degreased screw-on stud using a new brush. => Up to the area where the stud enters the bearing! 9. Move steering wheel from end stop to end stop 1-2 times. Then, turn the steering to the left lock again. Warning! Risk of trapping when steering at the same time! 10. Then apply Hylomar again. 11. Move steering wheel from end stop to end stop 1-2 times. Then, turn the steering to the right lock. Warning! Risk of trapping when steering at the same time! 12. Bellows installation: Coat contact surfaces of bellows and rack-and-pinion steering lightly with Renolit (A094 989 38 00). When doing so, ensure that the grease is underneath the edges of the bellows. Replace large clamps (A 000 995 89 08). 13. Repeat operation steps 4 to 5 on the other side. 14. Then repeat operation steps 7 to 12 for the screw-on stud on the other side. 15. Attach heat shield. 16. Install both holders of the rear muffler again. 17. Attach underfloor paneling. 18. When relocating the vehicle on the premises, please use Snow Chain Mode through the head unit. 19. Leave the Hylomar to dry for approx. 90 minutes. Note:Deactivate Snow Chain Mode after stopping the vehicle! 20. Then perform a test drive. If applying it does not resolve the problem alone, continue with the following additional steps: 1. Align vehicle and adjust track of the front and rear axle 2. Leave vehicle on axle alignment platform or drive onto another drive-on ramp lift. Vehicle must rest entirely on its wheels without relieving the load on the axles! 3. Mark the position of the eccentric screw connection between the tie rod and the tie rod mount on the rear axle steering/fork on the left and right using a thin marker. (See example in the picture: red marking between eccentric disk B and rear axle steering tie rod mount/fork D). 4. Now loosen these threaded connections on the left and right until the screws can be twisted easily. The rubber mount relaxes. 5. Connect Xentry Diagnostics. 6. Get started in the AIRMATIC control unit (N51/8) and call up the "Lifting and lowering the rear axle" menu item. Use the "Lifting and lowering the rear axle" menu to lift the rear axle. Raise the level of the vehicle to 95 mm using the "+" button (see picture). Wheels are still on the platform. Check the gauge in Xentry Diagnostics to see when the required level has been reached. 7. In this raised position, replace the nuts of both threaded connections, but do not tighten the nuts. Then, with the threaded connection still loosened, turn the eccentric screws / disks "B" back to the mark, as in the initial situation. Then tighten the screws with the required torque. 8. Lower the rear axle to the vehicle-specific normal level with Xentry

Inspect Seat Height Adjuster Barcode Label (See Pic.1) Locate the barcode label on the cross tube of the seat height adjuster. In isolated cases, the barcode label may be located on the front side of the cross tube. If not visible, remove the seat cushion to access the label. 2. Evaluate Production Status If Production Status is LOWER than E108 # Replace the seat frame base with the height adjuster motor. If Production Status is E108 or HIGHER # Do NOT replace parts. Please submit a TIPS case to the Body/Chassis/Entertainment inbox and attach: Video of the noise concern Photo of the barcode label To improve analysis quality, ensure the video meets the following criteria: Seat installed in the vehicle Quiet workshop environment Steady and smooth camera movement Good lighting on the suspected noise area Recording with two people (one filming, while the other is creating the noise-causing movement) Noise#causing movement must be clearly visible Camera position: From the rear footwell, looking forward at the front seat Verbal explanation included in English or German

Inspect Seat Height Adjuster Barcode Label (See Pic.1) Locate the barcode label on the cross tube of the seat height adjuster. In isolated cases, the barcode label may be located on the front side of the cross tube. If not visible, remove the seat cushion to access the label. 2. Evaluate Production Status If Production Status is LOWER than E108 Replace the seat frame base with the height adjuster motor. If Production Status is E108 or HIGHER Do NOT replace parts. Please submit a TIPS case to the Body/Chassis/Entertainment inbox and attach: Video of the noise concern Photo of the barcode label To improve analysis quality, ensure the video meets the following criteria: Seat installed in the vehicle Quiet workshop environment Steady and smooth camera movement Good lighting on the suspected noise area Recording with two people (one filming, while the other is creating the noise-causing movement) Noisecausing movement must be clearly visible Camera position: From the rear footwell, looking forward at the front seat Verbal explanation included in English or German

Cause Fogging of the headlamps is a natural phenomenon, which can occur under certain climatic conditions. It does not lead to any technical impairment of the headlamp. If a pressure compensation diaphragm is fitted in the housing cover, then the lamp unit is a "closed system". Remedy Headlamp: Remedy 1 Clearing fogged/condensed LED headlamps: 1. Drive vehicle into workshop (temperature higher than +18 C/+64.4 F) and connect the exhaust extraction. Note: Do not perform an engine wash before the defogging test. 2. Switch off the engine and connect battery support via a charger. 3. Open the hood. 4. Switch on the lights. 5. Leave the vehicle in this state for 60 minutes. 6. Check for formation of condensation, a significant reduction in the formation of condensation must be clearly recognizable (thawing progress). Clearing of fogged/condensed LED headlamps and LED rear lamps on electric vehicles: 1. Drive the vehicle into the workshop (temperature higher than +18 C/+64.4F). 2. Connect battery backup via a charger. 3. Open the front-end flap and ensure sufficient ventilation. 4. Switch on the lights. 5. Leave the vehicle in this state for 60 minutes. 6. Check for formation of condensation, a significant reduction in the formation of condensation must be clearly recognizable (thawing progress). Clearing fogged/condensed halogen/xenon headlamps: 1. Drive the vehicle into the workshop (temperature higher than +18 C/+64.4F). Note: Do not perform an engine wash before the defogging test. 2. Switch off the engine. 3. Open the hood. 4. Switch off the lights. 5. Leave the vehicle in this state for 60 minutes. 6. Check for formation of condensation, a significant reduction in the formation of condensation must be clearly recognizable (thawing progress). Note: If there is no visible reduction in condensation, check the headlamp for malfunctions. (see Remedy 2) It is not physically possible to defog the headlamps completely. Fogging does not impair the operation or the service life of the headlamp. Note: Only implement Remedy 1 for model series 463 (from model year 2018) and model series 465. Remedy 2 A defective headlamp can be identified as follows: 1. Check the headlamp for external damage and that the cover caps and the diaphragm are correctly seated. 2. Check the electrical connectors of the plugs and pins. 3. Check for leak tightness according to LI82.10-P-078307. The test can only be conducted on headlamps. 4. If the headlamp or the rear lamp has any external damage, replace the component part in accordance with the WIS instructions. Note: External damage to the headlamp/rear lamp or faulty seating of the cover caps does not present a warranty or goodwill case. Note: With headlamps, it is possible to install desiccant packs if the problem occurs repeatedly. Open ventilation system LI82.10-P-078302 Closed ventilation system LI82.10-P-078304

In conventional (combustion engine) driving operation, full heating output is available. Cause Possible defect in the N33/5 water heater (high-voltage PTC booster heater) Remedy If the N33/5 water heater (PTC booster heater, high voltage) is defective, it must be replaced with the latest part number. Note: Please refer to the information in XENTRY Parts Information and the latest WIS description. For vehicles manufactured before December 2025 with a BorgWarner water heater, the coolant hoses (inlet and outlet) must also be ordered and installed. For vehicles produced after December 2025, only the N33/5 water heater (PTC booster heater high voltage) needs to be replaced. Follow instructions in XPPI C74 note for the correct parts.

In conventional (combustion engine) driving operation, full heating output is available. Cause Possible defect in the N33/5 water heater (high-voltage PTC booster heater) Remedy If the N33/5 water heater (PTC booster heater, high voltage) is defective, it must be replaced with the latest part number. Note: Please refer to the information in XENTRY Parts Information and the latest WIS description. For vehicles manufactured before December 2025 with a BorgWarner water heater, the coolant hoses (inlet and outlet) must also be ordered and installed. For vehicles produced after December 2025, only the N33/5 water heater (PTC booster heater high voltage) needs to be replaced.

KeylessGo sensor surfaces do not respond. Door handles can extend/retract if the key is used for locking/unlocking. No particular fault code. 2. Surface-flush door handle fails to retract and/or extend. One or more of the following fault codes are current and stored: B185D96; B185E96; B186196; B186296 The following values are present in the control unit log (A17/x): Motor_bridge_connection_fatal_error = True (for example, see attachment) OR Motor_bridge_wrong_direction_fatal_error = True (for example, see attachment) 3. Surface-flush door handle fails to retract and/or extend. One or more of the following fault codes are current and stored: B185D96; B185E96; B186196; B186296 The following values are present in the control unit log (A17/x): Motor_init_error_for_sensors = True (for example, see attachment) 4. Surface-flush door handle fails to retract and/or extend. The fault code B185911 is stored in the DCU (N69/X). Cause 1. Software bug. 2. Software robustness. 3. Software robustness. 4. The motor resistance is outside the tolerance range. Remedy Depending on the identified Complaint above (items 1-4), please implement the corresponding remedial actions (items 1-4): 1. Perform a reset of the corresponding 'KEYLESS GO' door handle control unit (A17/x) via XENTRY (for example see attachment) add-on is available (add-on 32204 for XENTRY version 06/25) Please use one of the following damage codes: 8213H73; 8219773; 8213K73; 8219873 2. Please process the guided fault check via XENTRY (Add-on 32485 for XENTRY version 06/25; Add-on 32486 for XENTRY version 09/25). In the event of a proposed SCN coding, it must be carried out and the faults must then be cleared. Please use one of the following SSLs: 8213H73; 8219773; 8213K73; 8219873 3. Please process the guided fault check via XENTRY (Add-on 32485 for XENTRY version 06/25; Add-on 32486 for XENTRY version 09/25). In the event of a proposed renewal of the bearing bracket, the corresponding bearing bracket must be replaced. Please use one of the following SSLs: 80A0D73; 80N0D73; 80N0E73; 80A0E73 4. The motor resistance is too low. Bearing bracket must be replaced. Please use one of the following SSLs: 80A0D73; 80N0D73; 80N0E73; 80A0E73 Please note that other published GI documents may also be valid for assessing the problem. For example: "LI72.10-P-074316 Flush-Mounted Door Handle Jams When It Is Pulled Out". Please also refer to SI72.00-P-0014A in WIS. If after the remedy points above are performed, the problem is still present, please submit a TIPS case to the PTS-Body/Chassis/Entertainment inbox. In this case, store the damaged parts for further analyses.

occur under certain climatic conditions. It does not lead to any technical impairment of the headlamp. If a pressure compensation diaphragm is fitted in the housing cover, then the lamp unit is a "closed system". Remedy Headlamp: Remedy 1 Clearing fogged/condensed LED headlamps: 1. Drive vehicle into workshop (temperature higher than +18 C/+64.4 F) and connect the exhaust extraction. Note: Do not perform an engine wash before the defogging test. 2. Switch off the engine and connect battery support via a charger. 3. Open the hood. 4. Switch on the lights. 5. Leave the vehicle in this state for 60 minutes. 6. Check for formation of condensation, a significant reduction in the formation of condensation must be clearly recognizable (thawing progress). Clearing of fogged/condensed LED headlamps and LED rear lamps on electric vehicles: 1. Drive the vehicle into the workshop (temperature higher than +18 C/+64.4F). 2. Connect battery backup via a charger. 3. Open the front-end flap and ensure sufficient ventilation. 4. Switch on the lights. 5. Leave the vehicle in this state for 60 minutes. 6. Check for formation of condensation, a significant reduction in the formation of condensation must be clearly recognizable (thawing progress). Clearing fogged/condensed halogen/xenon headlamps: 1. Drive the vehicle into the workshop (temperature higher than +18 C/+64.4F). Note: Do not perform an engine wash before the defogging test. 2. Switch off the engine. 3. Open the hood. 4. Switch off the lights. 5. Leave the vehicle in this state for 60 minutes. 6. Check for formation of condensation, a significant reduction in the formation of condensation must be clearly recognizable (thawing progress). Note: If there is no visible reduction in condensation, check the headlamp for malfunctions. (see Remedy 2) It is not physically possible to defog the headlamps completely. Fogging does not impair the operation or the service life of the headlamp. Note: Only implement Remedy 1 for model series 463 (from model year 2018) and model series 465. Remedy 2 A defective headlamp can be identified as follows: 1. Check the headlamp for external damage and that the cover caps and the diaphragm are correctly seated. 2. Check the electrical connectors of the plugs and pins. 3. Check for leak tightness according to LI82.10-P-078307. The test can only be conducted on headlamps. 4. If the headlamp or the rear lamp has any external damage, replace the component part in accordance with the WIS instructions. Note: External damage to the headlamp/rear lamp or faulty seating of the cover caps does not present a warranty or goodwill case. Note: With headlamps, it is possible to install desiccant packs if the problem occurs repeatedly. Open ventilation system LI82.10-P-078302 Closed ventilation system LI82.10-P-078304

Cause The state of charge (SOC) of the 12V battery has dropped to 45% or less. Remedy This warning message appears as soon as the state of charge (SOC) of the 12V primary battery drops below 45%. This message is displayed to safeguard the vehicle's starting ability. At the same time as the display appears in the instrument cluster, customers with a linked Mercedes me connect account also receive a push notification via the app/by email (if this function is activated). The battery must be charged to a state of charge (SOC) of at least 50%. To do this, an external charger can be connected (please comply with AR54.10-P-1133S) or the vehicle can be driven (by the customer) for 30 to 60 minutes. Please make customers aware of how the vehicle behaves: If the vehicle is used for short journeys, the battery state of charge may slowly drop to less than 45% a negative charge balance A negative charge balance will also occur if the vehicle is used while stationary without running the engine, e.g. if the head unit is used, the ignition is switched on, or other comfort & convenience power consumers, e.g. seat heating/seat ventilation, are active. An unlocked vehicle may increase consumption, because certain vehicle functions are actively kept ready for the customer. In combination with Keyless-Go or flush-mounted door handles, the vehicle may be woken up if the vehicle key is detected in the vicinity of the vehicle. The cause of the discharge can be identified with the aid of the onboard electrical system data in the EZS using XENTRY Diagnosis. See attached examples for identifying typical customer situations (e.g. operation with ignition on, operation of head unit while stationary or vehicle unlocked while parked). Vehicles with code B01+801: When charging while stationary, the 48V battery must have a state of charge (SOC) of 70% before the 12V primary battery, or the secondary battery in the case of code 503, can be charged. To ensure optimum battery care, please also comply with the existing Service Information documents regarding the handling of stock vehicles (SI54.10-P-0024A) and on remaining in transport mode (SI54.00-P-0004A) until immediately before handover to end customers. Special note: Do not replace any parts, if the message has occurred due to battery discharge as a result of the driving profile or the ignition being switched on (see attached examples); in such cases separate warranty and goodwill invoicing is not possible, as this is a normal on-board electrical system protection function. Likewise battery care and recharging do not qualify as a W&G case. Please advise customers accordingly regarding the above-mentioned issues relating to vehicle use.

KeylessGo sensor surfaces do not respond. Door handles can extend/retract if unlocked/locked using the key. No particular fault code. 2. Flush-fitting door handle does not extend and/or retract. One or more of the following fault codes are current and stored: B185D96; B185E96; B186196; B186296 The following values are present in the control unit log (A17/x): Motor_bridge_connection_fatal_error = True OR Motor_bridge_wrong_direction_fatal_error = True (see attachment for example) 3. Flush-fitting door handle does not extend and/or retract. One or more of the following fault codes are current and stored: B185D96; B185E96; B186196; B186296 The following values are present in the control unit log (A17/x): Motor_init_error_for_sensors = True (for example, see attachment) 4. Flush-fitting door handle does not extend and/or retract. The fault code B185911 is stored in the DCU (N69/X). Cause 1. Software bug. 2. Software robustness. 3. Software robustness. 4. The resistance of the motor is outside of tolerance. Remedy Please perform the corresponding remedy measures (points 1-4) depending on the determined problem (points 1-4): 1. Perform a reset of the corresponding 'KEYLESS GO' door handle control unit (A17/x) via XENTRY (for example see attachment) add-on is available (add-on 32204 for XENTRY version 06/25) Please use one of the following damage codes: 8213H73; 8219773; 8213K73; 8219873 2. A control unit event log for the component part concerned (A17/x) must be created and the following values checked in the "Component Errors" section: Motor_bridge_connection_fatal_error = True (for example, see attachment) OR Motor_bridge_wrong_direction_fatal_error = True (for example, see attachment) If one of the values is "True": Perform an SCN coding on the corresponding 'KEYLESS GO' door handle control unit (A17/x) via XENTRY add-on is available (add-on 32280 for XENTRY version 06/25) The faults must be deleted after SCN coding. Please use one of the following damage codes: 8213H73; 8219773; 8213K73; 8219873 3. A control unit event log for the component part concerned (A17/x) must be created and the following value checked in the "Component Errors" section: Motor_init_error_for_sensors = True (for example, see attachment) If the value is "True": Bearing bracket must be replaced. Please use one of the following damage codes: 80A0D73; 80N0D73; 80N0E73; 80A0E73 4. The motor resistance is too low. Bearing bracket must be replaced. Please use one of the following damage codes: 80A0D73; 80N0D73; 80N0E73; 80A0E73 Please note that other published GI documents may also be valid for assessing the problem. For example: "LI72.10-P-074316 Flush-Mounted Door Handle Jams When It Is Pulled Out". If after the remedy points above are performed, the problem is still present, please submit a TIPS case to the PTS-Body/ Chassis/Entertainment inbox. In this case, store the damaged parts for further analyses.

occur under certain climatic conditions. It does not lead to any technical impairment of the headlamp. If a pressure compensation diaphragm is fitted in the housing cover, then the lamp unit is a "closed system". Remedy Headlamp: Remedy 1 Clearing fogged/condensed LED headlamps: 1. Drive vehicle into workshop (temperature higher than +18 C/+64.4 F) and connect the exhaust extraction. Note: Do not perform an engine wash before the defogging test. 2. Switch off the engine and connect battery support via a charger. 3. Open the hood. 4. Switch on the lights. 5. Leave the vehicle in this state for 60 minutes. 6. Check for formation of condensation, a significant reduction in the formation of condensation must be clearly recognizable (thawing progress). Clearing of fogged/condensed LED headlamps and LED rear lamps on electric vehicles: 1. Drive the vehicle into the workshop (temperature higher than +18 C/+64.4F). 2. Connect battery backup via a charger. 3. Open the front-end flap and ensure sufficient ventilation. 4. Switch on the lights. 5. Leave the vehicle in this state for 60 minutes. 6. Check for formation of condensation, a significant reduction in the formation of condensation must be clearly recognizable (thawing progress). Clearing fogged/condensed halogen/xenon headlamps: 1. Drive the vehicle into the workshop (temperature higher than +18 C/+64.4F). Note: Do not perform an engine wash before the defogging test. 2. Switch off the engine. 3. Open the hood. 4. Switch off the lights. 5. Leave the vehicle in this state for 60 minutes. 6. Check for formation of condensation, a significant reduction in the formation of condensation must be clearly recognizable (thawing progress). Note: If there is no visible reduction in condensation, check the headlamp for malfunctions. (see Remedy 2) It is not physically possible to defog the headlamps completely. Fogging does not impair the operation or the service life of the headlamp. Remedy 2 A defective headlamp can be identified as follows: 1. Check the headlamp for external damage and that the cover caps and the diaphragm are correctly seated. 2. Check the electrical connectors of the plugs and pins. 3. Check for leak tightness according to LI82.10-P-078307. The test can only be conducted on headlamps. 4. If the headlamp or the rear lamp has any external damage, replace the component part in accordance with the WIS instructions. Note: External damage to the headlamp/rear lamp or faulty seating of the cover caps does not present a warranty or goodwill case. Note: With headlamps, it is possible to install desiccant packs if the problem occurs repeatedly. Open ventilation system LI82.10-P-078302 Closed ventilation system LI82.10-P-078304

"P0A7F00" stored in the 48 V battery G1/3 and/or is current. Remedy 1. Check the SOHc of A66 48V battery. (For SOHr, see LI54.10-P-080199) 2. Carry out SOHc reset routine: - Switch on ignition - Read actual value 209 in XENTRY Diagnostics at G1/3 (48 V battery) "State of Health Capacity-SOHC" Valid for OBD markets -- If the value is > 80%, no restoration process required -- If the value is < 81%, continue with the following steps - Discharge Powerpack in vehicle - At SOC < 25%: Stop discharge and bring vehicle to sleep - >1.5h after vehicle sleep: Start engine and charge Powerpack to SOC >65% - At SOC > 65%: Stop operation and bring vehicle to sleep - >1.5h after vehicle sleep: Turn ignition on - Read Diagnostic Service C0C3 (State of Health Capacity - SOHC): if - Capacity > 74%: You can clear fault memory. Procedure finished. - Capacity < 74%: Repeat step 7 again. If after 2 repetitions value is still too high: Read diagnostic service FEE0 - FEE7 (Battery Analysis Protocol Part 1-8) and replace 48V Powerpack.Perform capacity restoration procedure: Valid for OBD markets - SOH > 82%: Process is complete and clear fault memory - SOH < 83%: Repeat the steps once more. If the value is still too low after 5 repetitions: Cancel healing process and provide feedback in TIPS case to the HV/LV team inbox labeled "SOHc cannot be reset"

P13C273 P13C278 P140473 Cause Various Remedy Model year 2024 254 and 167 with engine M254 -Update software of N127 PTCU. New software: 254- A2549022611 167- A2549022811 -Clear fault codes and check operation of the exhaust flap. Models with M256, or models with M254 after SW update -Check exhaust flap for free movement via actuation. -Remove flap actuator and check movement of flap in exhaust pipe. Replace exhaust pipe section if flap is binding. -Replace flap actuator if above checks are ok. If fault code returns after performing the above steps, open a TIPS case with the powertrain team. Note: Codes P13C273 and P13C278- Right side flap Code P140473- Left side flap

the vehicle is stationary and ECO Start/Stop is active (combustion engine is off). The noise is more noticeable outside the vehicle and in acoustically shielded areas such as closed rooms or garages. Cause The noise in the valve body (EHS) is caused by superimposed pressure peaks acting on the valves. This phenomenon occurs only after a certain running-in period due to the influence of micro-contamination in the valve bores. Remedy A hardware modification of the electro-hydraulic control unit (EHS) is currently being implemented (no change to the part number). This will be incorporated into series production and as a spare part starting from 12/2025. This is only a comfort-related complaint and has no impact on the functionality or service life of the transmission. For sensitive customers, the following measures can be performed: 1. Replace the electro-hydraulic control unit (EHS), the oil pan, and the transmission fluid. - Ensure all oil guide pipes are installed in the new valve body to prevent a new concern after replacement. (See attached location guide)

Note: When ECO start-stop is active, the engine is shut off before the 2-1 shift and the complaint will not occur. Cause Software application when engine is running. Remedy Short-term remedy: Perform IPR and follow the instruction to perform standstill adaptations. Long-term Solution: Aftersales software is currently in development. NOTE: The information contained in this document is intended for use by trained, professional technicians with the knowledge to properly and safely perform diagnosis and repairs on Mercedes-Benz vehicles, using Mercedes-Benz approved tools and equipment. It informs service technicians about conditions that could occur in certain vehicles and provides information that could assist in proper vehicle diagnosis, service, or repair. It does not indicate that a defect is present in any vehicle referenced in this document nor does it imply warranty coverage. DO NOT assume that a symptom or condition, or a described cause of a symptom or condition, affects any particular vehicle or groups of vehicles, or that a described repair applies to any particular vehicle or groups of vehicles. There can be multiple causes resulting in the same or similar symptoms or conditions described in this document, and trained professional service technicians must use their diagnostic skills to make evaluations on a case-by-case basis. The information contained in this document does not guarantee warranty coverage nor does it extend the vehicles warranty in any way.

This can be identified through control unit N45 or N15/7 in the quick test. When accelerating with light load, vibrations or jolting sensation may come from the drivetrain. It may be mistaken for a harsh shift. Cause Modified oil quality of the transfer case over time Remedy 1. Check initial quick test for faults in the following control units. N45 or N15/7 - All-wheel drive (ARS) N127 - 'Drivetrain' (PTCU) control unit Y3/8 - Transmission control for 9-gear transmission (VGS) N3/10 - Engine electronics for combustion engine If faults are present: Process them as per the guided test in Xentry. If no faults are present: 2. Check the transmission oil level If the oil level is correct: 3. Unplug the connector for the transfer cases control unit and reassess the vehicle on a subsequent test drive If the complaint no longer occurs with the control unit disconnected: 4. Perform an oil change of the transfer case according to WIS specifications - Collect an oil sample of the original fluid 5. Complete all transfer case Tech-in processes located under VG Control Unit > Adaptations - Resetting the oil service data - Calibration of N15/7 5. Perform road test of vehicle to bring transmission to operating temperature ( >60C ) 6. Operate vehicle in full circle with steering at full lock - 5x to the left - 5x to the right 7. Perform an extended 200mi road test to ensure the clutches are properly conditioned with the new oil. 8. Reassess the concern and release the vehicle if no longer present. If the concern continues to occur with the control unit disconnected or after the above steps have been performed, please submit a TIPS case to the Powertrain inbox with the following information: - Initial quick test with fault freeze frame data - Initial transmission EEPROM data - VGS and Transfer Case Control Unit Log (N45 or N15/7) - Photo of the original oil condition - What color was the fluid drained from the transfer case before the oil change? - Was an oil sample collected, and can you provide a photo of the original fluid? - What color and part number fluid was used during the oil change? - How far was the vehicle driven after?

system battery) from software release A 000 902 50 48 to software release A 000 902 15 89, the fault code B183319 may be output. B183319 "The battery for the 48V on-board electrical system has a malfunction. The limit value for current has been exceeded" Cause Anomaly in the software update Remedy Please perform the following steps in the specified sequence: 1.) Delete fault codes 2.) Disconnect XENTRY Diagnosis and the 12 V battery charger 3.) Disconnect ground cable from the 12 V battery 4.) Ensure bus idle for at least 10 minutes 5.) Re-connect ground cable to the 12 V battery 6.) Delete fault codes again 7.) Perform a test drive 8.) Check fault codes > If fault code B183319 is still current, continue with the guided fault analysis in XENTRY Diagnosis. > If fault code B183319 goes to stored and can be cleared, no further action is required.

clattering) can be heard underneath the bench seat, particularly in the case of a full tank (1/1 fill level). Cause The vibrating air column of the purge flow volume triggers the fill limit vent valve (FLVV) to open and close repeatedly when the fuel tank is full. Remedy By reducing the fuel quantity by around 5 liters, the noise can no longer be heard. In isolated cases, the noise can also be amplified by a fuel tank installed under stress and therefore lines adjacent to the body-in-white (above the fuel tank). In this case, the installation position of the fuel tank and the contact surfaces to the body-in-white must be checked. To do so, loosen the fuel tank and refasten it. Please do not replace component parts such as the fuel tank, activated charcoal canister, purge valve or delivery module, as this does not provide a remedy. If a similar noise can be heard with a tank fill level of, for example, 3/4 or 1/4 and not with a full tank (1/1), there is a different issue.

KeylessGo sensor surfaces do not respond. Cause Multiple possible causes can be inferred from the table, see remedy (additionally as reference table in attachment). Remedy 1) KeylessGo sensor surfaces do not respond. Door handles can extend/retract if the key is used for locking/unlocking. No particular fault code. Perform an A17/x (handle controller) reset via XENTRY (for example see attachment - under actuations tab for A17/x controller) -> add-on is available (add-on 32204 for XENTRY version 06/25) Please use one of the following damage codes: 8213H; 82197; 8213K; 82198 2) Surface-flush door handle fails to retract and/or extend One or more of the following fault codes are current and stored: B185D96; B185E96; B186196; B186296 A control unit event log for the component part concerned (A17/x) must be created and the following values checked in the "Component Errors" section: Motor_bridge_connection_fatal_error = True (for example, see attachment) OR Motor_bridge_wrong_direction_fatal_error = True (for example, see attachment) If one of the values is "True": Perform an SCN coding on the door handle A17/x via XENTRY -> add-on is available (add-on 32280 for XENTRY version 06/25) The faults must be deleted after SCN coding. Please use one of the following damage codes: 80A0F; 80N0F; 80N0G; 80A0G 3) Surface-flush door handle fails to retract and/or extend One or more of the following fault codes are current and stored: B185D96; B185E96; B186196; B186296 A control unit event log for the component part concerned (A17/x) must be created and the following value checked in the "Component Errors" section: Motor_init_error_for_sensors = True (for example, see attachment) If the value is "True" Bearing bracket must be replaced. Please use one of the following damage codes: 80A0F; 80N0F; 80N0G; 80A0G 4) Surface-flush door handle fails to retract and/or extend The fault code B185911 is stored in the DCU (N69/X). The motor resistance is too low. Bearing bracket must be replaced. Please use one of the following damage codes: 80A0D; 80N0D; 80N0E; 80A0E If after the remedy points above are performed and the problem is still present, then please create a TIPS case and direct to the Body/Chassis/Entertainment inbox. Include your control unit logs, photos/videos, and quick tests to show diagnosis performed thus far. -> In this case, store the damaged parts for further analyses.

Noise MUST match those heard in the attached videos. Cause Wheezing noises: Flow noises of the shock absorber fluid Squeaking noise: From the mechanical rubber valve in the dividing piston Remedy Replace shock absorber(s). If noise persists after replacement, please create a TIPS case to the Body, Chassis, Entertainment inbox referencing this LI and include sound/video files.

- Current and saved fault code in DCCU and powertrain control unit (PTCU): P2E9873 The position sensor of the external socket flap of the vehicle socket (direct current) indicates an electrical fault. The actuator does not open. - The vehicle starts or charges normally and without any problems. Cause Software in the control unit "N116/5 - DC charge-connection unit (DCCU)". Remedy For model series 167, 254 (Only for USA): Remedy is available: Update software for N116/5 (DC charging control unit box) and perform SCN coding of N116/5. Once the SCN coding has been updated, the engine diagnosis indicator lamp (MIL) is no longer actuated with this fault code. For Model Series 214: Ensure N116/5 DCDC has latest software. Perform SCN coding of the PTCU controller. If MIL is still active, please open TIPS case and send to Body/Chassis/Entertainment inbox. For other model series: Work on the SW remedy for N116/5 (DC charging control unit box) is in progress. Once the software is available, update the software for N116/5 and perform SCN coding of N116/5. If this problem occurs, the vehicle start or charging functions are normally not affected; therefore do not replace any parts. Replacing parts does not solve this problem.

Cause Communication timeouts mean that communication errors may occur in the on-board electrical system, which can result in various fault messages being displayed in the instrument cluster. This could be down to delayed feedback from the drivetrain control unit (N127) (CPC) to other control units networked to the CAN bus. Information: It may not be possible to attribute any communication errors stored in the control units on the CAN bus to a specific cause. In rare instances, there may be a brief activation of the yellow warning lamp for engine diagnosis or there may be a sporadic delay with the start enable. There may not be any specific fault codes present that indicate a specific component. Remedy Do not replace any components!!! 1. Connect charger (see AR54.10-P-1127WT). Note: An adequate voltage from the on-board electrical system battery must be guaranteed for the entire duration of the work procedure. Otherwise the control units could be damaged if an undervoltage occurs. Information: Observe the operating instructions of the charger. Information: Use the charger to ensure an adequate voltage (at least 12.5 V) from the on-board electrical system battery. 2. Connect diagnostic system (see AD00.00-P-2000-06FR). Note: Always use the latest XENTRY Diagnostics software release. Information: Strict compliance with the operation steps in XENTRY Diagnostics is absolutely essential. 3. Select control unit N127 (CPC) via the direct link using XENTRY Diagnosis. Information: To do so, select the following menu items: Control units view Drive systems N127 - "Powertrain" control unit (CPC). 4. Update software for control unit N127 (CPC) (see AR54.21-P-0014-01Y). Info: To do so, select the following menu items: Adaptations Control unit update Update control unit software. Information: You are then automatically guided through the steps "Update of control unit software" and "SCN coding". Always observe the following operation steps at all times. 5. Disconnect diagnostic device from vehicle (see AD00.00-P-2000-06FR). 6. Disconnect charger from vehicle (see AR54.10-P-1127WT).

- Current and saved fault code in DCCU and powertrain control unit (PTCU): P2E9873 The position sensor of the external socket flap of the vehicle socket (direct current) indicates an electrical fault. The actuator does not open. - The vehicle starts or charges normally and without any problems. Cause Software in the control unit "N116/5 - DC charge-connection unit (DCCU)". Remedy For model series 167, 254 (Only for USA): Remedy is available: Update software for N116/5 (DC charging control unit box) and perform SCN coding of N116/5. Once the SCN coding has been updated, the engine diagnosis indicator lamp (MIL) is no longer actuated with this fault code. For model series 214: Perform SCN coding of the Powertrain Control Unit (PTCU) If the MIL does not clear after coding, please open a TIPS case and send to the Body/Chassis/Entertainment inbox. For other model series: Work on the SW remedy for N116/5 (DC charging control unit box) is in progress. Once the software is available, update the software for N116/5 and perform SCN coding of N116/5. If this problem occurs, the vehicle start or charging functions are normally not affected; therefore do not replace any parts. Replacing parts does not solve this problem.

Cause Moisture may collect in the compressor of the air suspension over its lifetime, which can result in corrosion. Corrosion can result in reduced compressor performance or be deposited on the valve seats of the valve block and subsequently result in internal micro leakages. Remedy Update software for air suspension compressors as of 08/2022 or vehicles produced after 08/2020. Updated software removes moisture from the system by lifting and lowering the vehicle level maximum +/- 10 mm while driving. The process is not a cause for complaint, but rather corresponds to the current series production configuration. Replacement of parts is not necessary in this scenario.

with Easy Entry function), noise (breakaway noise) when leaving the limit stops of the height adjustment. Cause Height adjustment moves to the top/bottom limit stop and jams. 1. Driver seat control unit software 2. Steering column height adjustment transmission Remedy There are 2 repair procedures to follow depending on vehicle (differentiated according to model and vehicle manufacturing date) 1. Perform software update of driver's seat control unit 2. Replace repair kit for steering column height adjustment Procedure 1: Perform software update of driver seat control unit. ALL models except 205/253/293/222/217/231/463/213/238/257/290 up to special equipment code 801. Move out the fore/aft adjustment to the end position. Release jamming of height adjustment by knocking with palm of hand onto top of steering wheel/at the same time pressing adjustment switch downward After releasing the jam, perform a software update of the driver's seat control unit If procedure 1 is not effective, there is no new software available for the driver seat control unit, or the chassis is not listed above (167, 223, 294, 206, 294, 295, 296, 297,232,214,254) then use procedure 2. Procedure 2: Replace repair kit for steering column height adjustment. Move out the fore/aft adjustment to the end position. Release jamming of height adjustment by knocking with palm of hand onto top of steering wheel/at the same time pressing adjustment switch downward Remove footwell trim on driver's side. Determine type version of height adjustment in XENTRY Parts Information and order appropriate replacement part (refer to attachment). 1. Version A: A 231 460 77 00 2. Version B: A 205 460 38 03 Remove steering column. Remove height adjustment (adjustment repair kit). Install repair kit (adjustment repair kit) (observe tightening torque for screws in attachment). Install steering column. If possible, flash driver seat control unit to latest software release or code SCN again. Commission driver seat control unit (normalization of limit stops is deleted and learning process repeated).

Ventilation Regulator Valve Performance: The valve for crankcase ventilation has a malfunction Cause The partial-load ventilation valve (a part of the intake line assembly) may not work as intended. Remedy **Important** Replacement of the engine wiring harness or control unit is not needed if oil is found at the electrical connection of the crankcase ventilation valve or control unit. Replacement is only allowed if other symptoms or faults are present. Perform either remedy A or remedy B depending on the model Remedy A: SLK/SLC300, C350e hybrid, and GLC350e hybrid Perform guided test for fault code P052E71. Replace intake line assembly if necessary per results of the guided test. Software is not planned for models SLK/SLC300, C350e, and GLC350e. Remedy B: All other vehicles- (Replacement of intake line assembly is not required.) 1- Perform software update for N3/10 Engine control unit. 2- Remove upper engine cover. 3- Unclip ME-SFI control unit (N3/10) with bracket and place to one side with connected lines (see AR07.08-P-7013MRD). 4- Release and disconnect electrical connector (4) of partial-load operation crankcase ventilation valve (Y58/2). 5- Fit cap A094 545 50 03 on electrical connector (4) of engine wiring harness partial load operation crankcase ventilation valve (Y58/2) and ensure correct seating on plug of electrical connector (4). 6- Strap down electrical line (4) of partial load operation crankcase ventilation system valve (Y58/2) at wiring harness. Ensure that electrical line (4) is routed free of tension. 7- Clip in ME-SFI[ ME] control unit (N3/10) with bracket, ensure control unit is correctly seated at attachment points. New software part numbers: 2015-2017 C300 w/722.9 transmission- 2749021202 2749031506 2016-2018 C300 and GLC300 w/725 transmission- 2749021802 2749031806 2019 GLC300- 2749020802 2749031306 2017-2018 E300- 2749021902 2749031906 2019 E300- 2749020702 2749031206 This LI is in relation to NCU dated 8/31/2023 "Emission Extended Warranty Intake Line Assembly".

In contrast to a leaky headlamp, physical fogging does not result in a technical impairment of the headlamp. A leak test must be performed to determine if physical fogging exists or if the headlamp is leaky. Remedy Check for external damage: You can identify a damaged headlamp in the following way: For headlamps with a closed system 1. Check the headlamps for any external damage and check also for correct seating of the Gore-diaphragm/correct latching of the cover caps. 2. If the headlamp exhibits any external damage, replace the headlamp. For headlamps with an open system 1. Check the headlamps for any external damage and seal off the vent, then make sure the cover caps are latched correctly into place. 2. If the headlamp exhibits any external damage, replace the headlamp. Note: External damage to the headlamp does not present a warranty or goodwill case. 1. Clear fogged/condensed LED headlamps and LED rear lamps: 1. Drive the vehicle into the workshop (temperature higher than +18 C/+64.4F). Note: Do not perform an engine wash before the defogging test. 2. Switch off the engine and connect battery support via a charger. 3. Open the hood or trunk. 4. Switch on the lights. 5. Leave the vehicle in this state for 60 minutes. 6. Check for formation of condensation, a significant reduction in the formation of condensation must be clearly recognizable (thawing progress). 7. If the condensation has disappeared, nothing else has to be done. Note: If defrosting has been performed, you can skip the first step. 2. Leak test of headlamp with overpressure: Connect test adapter to pressure tester. (Figure 1) Check test adapter for leak tightness. To do so, connect plug and coupling (picture 2) and apply a maximum overpressure of 30 mbar. The pressure must remain constant. If the pressure does not remain constant, use a new adapter. All vents have to be sealed with sealing compound and the existing diaphragm with the stamp (picture 3 [3]). (Picture 4) Make allowance for the different headlamp variants here (there are different outlet openings). Check if the headlamp needs to be removed to gain access to the diagnostic socket on the headlamp housing. Plug the adapter onto the diagnostic socket on the headlamp housing. (Picture 5). Apply a maximum of 30 mbar overpressure to the headlamp housing. Note: If the maximum overpressure of 50 mbar is exceeded the headlamp seal will be damaged (picture 6). If a pressure drop of less than 10 mbar is measured within 30 seconds, the headlamp is tight and there is natural physical condensation. If a higher pressure drop than 10 mbar is measured within 30 seconds, the headlamp is leaky. Note: The leaky position can be localized with the aid of soap suds. If the pressure test is not passed, the headlamp is leaky. If the cause cannot be rectified, the headlamp must be replaced. Note: If the headlamp is replaced, no dry packs may be installed on the new replacement headlamp. AR82.10-P-5455WT was created for the pressure test. This AR can be used as a reference manual for all closed headlamps. In the event of an open headlamp system, the vent ducts must be sealed before the pressure test.

occur under certain climatic conditions. It does not lead to any technical impairment of the headlamp. Remedy NOTE: If a pressure compensation diaphragm is fitted in the housing cover, then the lamp unit is a "closed system". Headlamp: Remedy 1 Clearing fogged/condensed LED headlamps and LED rear lamps: 1. Drive vehicle into workshop (temperature higher than +18 C/+64.4 F) and connect the exhaust extraction. Note: Do not perform an engine wash before the defogging test. 2. Switch off the engine and connect battery support via a charger. 3. Open the hood or trunk. 4. Switch on the lights. 5. Leave the vehicle in this state for 60 minutes. 6. Check for formation of condensation, a significant reduction in the formation of condensation must be clearly recognizable (thawing progress). Clearing fogged/condensed halogen/xenon headlamps: 1. Drive the vehicle into the workshop (temperature higher than +18 C/+64.4F). Note: Do not perform an engine wash before the defogging test. 2. Switch off the engine. 3. Open the hood. 4. Switch off the lights. 5. Leave the vehicle in this state for 60 minutes. 6. Check for formation of condensation, a significant reduction in the formation of condensation must be clearly recognizable (thawing progress). Note: If there is no visible reduction in the formation of condensation, check the headlamp for damage. (See Remedy 2) It is not physically possible to defog the headlamps completely. Fogging does not impair the operation or the service life of the headlamp. Remedy 2 A damaged headlamp can be identified as follows: 1. Check the headlamp for external damage and that the cover caps and the diaphragm are correctly seated. 2. Check the electrical connectors of the plugs and pins. 3. Check for leak tightness in accordance with LI82.10-P-078896 The test can only be conducted on headlamps. 4. If the headlamp or the rear lamp has any external damage, replace the component part in accordance with the WIS instructions.

- Current and saved fault code in DCCU and powertrain control unit (PTCU): P2E9873 The position sensor of the external socket flap of the vehicle socket (direct current) indicates an electrical fault. The actuator does not open. - The vehicle starts or charges normally and without any problems. Cause Software in the control unit "N116/5 - DC charge-connection unit (DCCU)". Remedy For model series 167 (Only for USA): Remedy is available: Update software for N116/5 (DC charging control unit box) and perform SCN coding of N116/5. Once the SCN coding has been updated, the engine diagnosis indicator lamp (MIL) is no longer actuated with this fault code. For other model series: Work on the SW remedy for N116/5 (DC charging control unit box) is in progress. Once the software is available, update the software for N116/5 and perform SCN coding of N116/5. If this problem occurs, the vehicle start or charging functions are normally not affected; therefore do not replace any parts. Replacing parts does not solve this problem.

Engine in limp-home mode. Rough running. Low fuel rail pressure fault code P008700 stored in MRG2 control unit. Additional faults below may be stored in MRG2 control unit: Misfire- P030000, P030100, P030200, P030300, P030400, P030084, P030004 Mixture adaptation- P217800 P218762, P017100, P017200, P217700 Injector malfunction- P02EE00, P02EF00, P02F000, P02F100, P214601, P214901 Cause Gas bubbles forming in low pressure fuel system due to fuel boiling. Remedy -Check engine control unit N3/10 for software update. -Proceed with software update if new software version 2549032303, 2549032403, 2549032503 or 2549032603 are found. -Clear faults and check for any symptoms on road test **Do not replace hardware unless clear part malfunction is determined**

Engine in limp-home mode. Rough running. Low fuel rail pressure fault code P008700 stored in MRG2 control unit. Additional faults below may be stored in MRG2 control unit: Misfire- P030000, P030100, P030200, P030300, P030400, P030084, P030004 Mixture adaptation- P217800 P218762, P017100, P017200, P217700 Injector malfunction- P02EE00, P02EF00, P02F000, P02F100, P214601, P214901 Cause Gas bubbles forming in low pressure fuel system due to fuel boiling. Remedy C300, CLE300, E350, GLC300 and GLE350 -Check engine control unit N3/10 for software update. -Proceed with software update if new software version 2549032303, 2549032403, 2549032503 or 2549032603 are found. -Clear faults and check for any symptoms on road test early 2024 GLE350 Check if symptom can be reproduced during normal drive cycle. -If reproducible, diagnose the cause of low pressure in fuel system. -If not reproducible, drain and refill fuel tank with top tier premium gasoline. Clear faults and check vehicle operation. Software solution release for remaining models/model years to prevent fuel boiling in low pressure system ETA in Q1 2025. **Do not replace parts unless clear part malfunction is determined**

unit N127: P052497 The oil pressure is too low. The system function is restricted. P052400 The oil pressure is too low Cause Various Remedy If low oil level warning present diagnose cause of this first. -Check engine oil level and correct if necessary. Refer to vehicle specific instructions AP18.00-P-1848U -Check for external engine oil leaks -Measure engine oil pressure via graphical representation in MRG actual values. In one measurement capture the pressure at idle, 1000, 2000, and 3000 rpm. Hold each range for approx. 5 seconds. -Save results as CSV file -Create TIPS case and submit to the powertrain team, including Oil pressure test results CSV file Initial quick test Any additional test results or observations Any previous diagnosis or repairs performed

Cause Frictional vibrations Remedy AMG brake systems are designed for high loads. This can result in noises under certain operating conditions and driving styles. Please refer to the Operator's Manual for further information such as care and maintenance instructions (washing vehicle directly after heavy use and using approved cleaning agents). These are dependent on speed, brake pressure or ambient conditions such as temperature and air humidity. 1. Beginning Diagnostics: a) Check whether, apart from this document, an additional document exists for the model series in question, and if so, work through it and then continue with1b. b) Check whether the complaint can be reproduced and at which axle or side the noises occur (ideally together with the customer while driving). c) Check the affected system for component wear, mechanical damage or localized overheating damage. 1. Replace damaged components as necessary and re-assess noise concern. d) Secure vehicle on a lift. 1. Start the engine and depress the brake pedal 3-4 times. 2. Check each wheel to see if they turn freely by hand. 3. If a wheel is not turning freely by hand, this needs to be addressed prior to re-assessing the noise concern. e) Assess condition of brake rotors and pads per WIS and visually (i.e. long periods of stagnation, etc...). 2. Specific Axle Work: NOTE: If brake pad has a metal backing plate, there is no need to affix the adhesive film. a) If the noises are coming from the front axle => Affix linings with adhesive film (see attachments for front axle). If backing plate is installed on pads, move to step 3. 1. Remove brake linings of front axle. 2. Clean all contact points on brake lining and brake caliper/carrier. 3. Clean bonding surface (where pistons contact back of brake pad). Apply adhesive film to the backplate of the piston-side brake lining. For 6 piston calipers, only in the area of the center piston. For other piston caliper configurations less than 6, apply where the piston(s) makes contact with the back of the pad. 4. Chamfer edges (round off sharp leading edges) on brake pads. See picture "Chamfered Pads". 5. After installing the brake linings, actuate the brake for 30 seconds. b) If the noises are coming from the rear axle => Affix linings with adhesive film and grease the lining as per the specification (see attachments for rear axle). 1. Remove brake pads of rear axle. 2. Cleaning all contact points on brake lining and brake caliper/carrier. 3. Grease contact points (red areas) between brake lining and guide of brake caliper with heat-resistant lubricating paste. 4. Clean bonding surface (where pistons contact back of brake pad). Apply adhesive film to the backplate of the piston-side brake lining. 5. Chamfer edges (round off sharp leading edges) on brake pads. See picture "Chamfered Pads". IMPORTANT: Be absolutely certain to not allow paste between friction surfaces of the pad and disc! 3. Brake Bedding Process: a) Before trip, the mileage incurred must be clarified with the customer (approx. 30 miles). b) Select a suitable route so speeds of approximately 65 MPH can be achieved. c) Brake the vehicle 15 times with a brake pressure of approx. 30 bar (have the passenger read it out using XENTRY) from 62 MPH to 30 MPH (no emergency stops and no braking in the ESP control range). Maintain a cooling distance of approx. 1 mile between brake applications. d) Finally drive approx. 3 miles to allow the system to cool. e) Reassess noise.

Cause Under analysis. Remedy To narrow down the cause, first of all remove the door trim. If the noise continues to occur even with the door trim removed, then continue the diagnosis working towards the speaker and if necessary, create a TIPS case with an informative video as an attachment. Note: Please refer to this document in the warranty claim and, once diagnosis is completed, select the damage code depending on the component part that is causing the issue. If the noise stops when the door trim is removed, please proceed in accordance with LI72.10P067691. Information: In this case, do not use a damage code for the speakers in the warranty claim!

with one of the following scenarios: Flashing without a speed limit (" "). Flashing when current vehicle speed is under speed limit. Flashing between US speed limit symbol and European speed limit symbol. NOTE: Verify that the concern falls under one of the attachment videos. If not, then it is outside of the scope of this LI. This also does not cover "Traffic Sign Inoperative" messages on the instrument cluster. Cause There are two identified reasons for this concern: 1. Country code information stored incorrectly at a particular geographic latitude range. 2. Incorrect reference data when the vehicle is started and a GPS signal is not immediately available. Remedy Update head unit software to latest version and the recheck function in the same location. NOTE: Updated head unit software for AMG's has NOT been released yet. ETA 12/2026. If vehicle is still exhibiting one of the symptoms as described exactly as in the complaint section or as shown in the video attachments, open a TIPS case to the Body/Chassis/Entertainment inbox with the following: Video of the concern. Exact location (latitude and longitude is best)

(A26/17 MBUX multimedia system + instrument cluster (head unit)) to E333.8 / A236 904 19 00. Cause Head unit software (CIVIC206) Remedy NOTE: Do not replace any component parts The new Apple Music app version is now available. The app should automatically be downloaded and available. If the app is not shown available, check via the MercedesBenz App Store directly in the vehicle and download the app. NOTE: Please refer to this LI in the warranty claim in the "Notes" section!

with one of the following scenarios: Flashing without a speed limit (" "). Flashing when current vehicle speed is under speed limit. Flashing between US speed limit symbol and European speed limit symbol. NOTE: Verify that the concern falls under one of the attachment videos. If not, then it is outside of the scope of this LI. This also does not cover "Traffic Sign Inoperative" messages on the instrument cluster. Cause There are two identified reasons for this concern: 1. Country code information stored incorrectly at a particular geographic latitude range. 2. Incorrect reference data when the vehicle is started and a GPS signal is not immediately available. Remedy Update head unit software to latest version and the recheck function in the same location. If vehicle is still exhibiting one of the symptoms as described exactly as in the complaint section or as shown in the video attachments, open a TIPS case to the Body/Chassis/Entertainment inbox with the following: Video of the concern. Exact location (latitude and longitude is best)

Cause Under analysis. Remedy To narrow down the cause, first of all remove the door trim. If the noise continues to occur even with the door trim removed, then continue the diagnosis working towards the speaker and if necessary, create a TIPS case with an informative video as an attachment. Information: Please refer to this document in the warranty claim and, after completing diagnosis, select the damage code corresponding to the component part that caused the problem. If the noise stops when the door trim is removed, please proceed in accordance with LI72.10-P-067691. Information: In this case, do not use a damage code for the speakers in the warranty claim!

a new software update for the MBUX Infotainment System. An OTA update will further enhance functionality and stability of the MBUX Infotainment System. This OTA update will include New DIGITAL LIGHT projections for opening/closing the vehicle doors, Apple iPhone notifications synchronization, and removal of online Metadata Enrichment (e.g. album cover pictures, composer information, and pictures of the artist). MBUSA will conduct an OTA service campaign. Remote software updates are automatically downloaded and installed in the customers vehicle free of charge and do not require a dealer visit.

with one of the following scenarios: Flashing without a speed limit ("- -"). Flashing when current vehicle speed is under speed limit. Flashing between US speed limit symbol and European speed limit symbol. NOTE: Verify that the concern falls under one of the attachment videos. If not, then it is outside of the scope of this LI. This also does not cover "Traffic Sign Inoperative" messages on the instrument cluster. Cause There are two identified reasons for this concern: 1. Country code information stored incorrectly at a particular geographic latitude range. 2. Incorrect reference data when the vehicle is started and a GPS signal is not immediately available. Remedy Do not replace parts. Please open a TIPS case to the Body/Chassis/Entertainment inbox but read the below carefully: The vehicle must be exhibiting the concern as shown in the attachment videos. The vehicle DOES NOT need to be at the dealer, nor does it need to be brought into the dealership. If the geographic location is known, it is very important that it is provided. Provide any pictures or videos, if available. A new software for the head unit is scheduled for tentative release in Q3 2026.

2. Service confirmation is not possible because "Perform vehicle handover" is displayed. This cannot be carried out. 3. The service display in the instrument cluster permanently displays 365 days (remaining time) and does not change. Cause Routine change in the software in N133/1 (instrument cluster) or A26/17 (MBUX multimedia system and instrument cluster (head unit)). Vehicle handover was not performed. Remedy For model series 290 AMG up to and including AEJ 22 and model series 167 up to and including AEJ 21/2, the following applies: Manually commission already-installed instrument cluster control unit N133/1 and then perform special procedure to re-initialize ASSYST data in N127 powertrain control unit. The following applies to model series 167 from AEJ 22/1 onward, 192 AMG, 206, 214, 223, 232 AMG, 236, 254, 290 AMG from AEJ 23 onward, 294, 295, 296, 297 and 465: Reinitialize ASSYST Plus under Adaptations Teach-in processes ASSYST PLUS in control unit N133/1 (instrument cluster) or A26/17 (MBUX multimedia system and instrument cluster (head unit)), and then perform the special procedure for reinitializing the ASSYST data in powertrain control unit N127.

when using flashing method ethernet to USB-C. Until further notice, please flash via VCI only.

2. Service confirmation is not possible because "Perform vehicle handover" is displayed. This cannot be carried out. 3. The service display in the instrument cluster permanently displays 365 days (remaining time) and does not change. Cause Routine change in the software in N133/1 (instrument cluster) or A26/17 (MBUX multimedia system and instrument cluster (head unit)). Vehicle handover was not performed. Remedy For model series 290 AMG up to and including AEJ 22 and model series 167 up to and including AEJ 21/2, the following applies: Manually commission already-installed instrument cluster control unit N133/1 and then perform special procedure to re-initialize ASSYST data in N127 powertrain control unit. For model series 167 as of AEJ 22/1, 192 AMG, 206, 214, 232 AMG, 236, 254, 290 AMG as of AEJ 23, 294, 295, 296, 297 and 465, the following applies: Reinitialize ASSYST Plus under Adaptations Teach-in processes ASSYST PLUS in control unit N133/1 (instrument cluster) or A26/17 (MBUX multimedia system and instrument cluster (head unit)), and then perform the special procedure for reinitializing the ASSYST data in powertrain control unit N127.

2. Service confirmation is not possible because "Perform vehicle handover" is displayed. This cannot be carried out. 3. The service display in the instrument cluster permanently displays 365 days (remaining time) and does not change. Cause Routine change in the software in N133/1 (instrument cluster) or A26/17 (MBUX multimedia system and instrument cluster (head unit)). Vehicle handover was not performed. Remedy For model series 290 AMG up to and including AEJ 22 and model series 167 up to and including AEJ 21/2, the following applies: Manually commission already-installed instrument cluster control unit N133/1 and then perform special procedure to re-initialize ASSYST data in N127 powertrain control unit. For model series 167 as of AEJ 22/1, 192 AMG, 206, 214, 232 AMG, 236, 254, 290 AMG as of AEJ 23, 294, 295, 296, 297 and 465, the following applies: Reinitialize ASSYST Plus under Adaptations Teach-in processes ASSYST PLUS in control unit N133/1 (instrument cluster) or A26/17 (MBUX multimedia system and instrument cluster (head unit)), and then perform the special procedure for reinitializing the ASSYST data in powertrain control unit N127.

with one of the following scenarios: Flashing without a speed limit ("- -"). Flashing when current vehicle speed is under speed limit. Flashing between US speed limit symbol and European speed limit symbol. NOTE: Verify that the concern falls under one of the attachment videos. If not, then it is outside of the scope of this LI. This also does not cover "Traffic Sign Inoperative" messages on the instrument cluster. Cause There are two identified reasons for this concern: 1. Country code information stored incorrectly at a particular geographic latitude range. 2. Incorrect reference data when the vehicle is started and a GPS signal is not immediately available. Remedy Do not replace parts. Please open a TIPS case to the Body/Chassis/Entertainment inbox but read the below carefully: The vehicle must be exhibiting the concern as shown in the attachment videos. The vehicle DOES NOT need to be at the dealer, nor does it need to be brought into the dealership. If the geographic location is known, it is very important that it is provided. Provide any pictures or videos, if available. A new software for the head unit is scheduled for tentative release in Q2 2026.

with one of the following scenarios: Flashing without a speed limit ("- -"). Flashing when current vehicle speed is under speed limit. Flashing between US speed limit symbol and European speed limit symbol. NOTE: Verify that the concern falls under one of the attachment videos. If not, then it is outside of the scope of this LI. This also does not cover "Traffic Sign Inoperative" messages on the instrument cluster. Cause There are two identified reasons for this concern: 1. Country code information stored incorrectly at a particular geographic latitude range. 2. Incorrect reference data when the vehicle is started and a GPS signal is not immediately available. Remedy No TIPS case is necessary. Do not replace parts. A new software for the head unit is scheduled for tentative release in Q2 2026.

Mercedes me services - activation not possible Notes: - The event code "B129C00 - Malfunction in control unit for telematics services" is active and stored - The head unit shows no internet connection Cause Under analysis. Remedy Please create a TIPS case, attach a RAMSES control unit log to the case.

with one of the following scenarios: Flashing without a speed limit ("- -"). Flashing when current vehicle speed is under speed limit. Flashing between US speed limit symbol and European speed limit symbol. Cause There are two identified reasons for this concern: 1. Country code information stored incorrectly at a particular geographic latitude range. 2. Incorrect reference data when the vehicle is started and a GPS signal is not immediately available. Remedy No TIPS case is necessary. Do not replace parts. A new software for the head unit is scheduled for tentative release in Q4 2025 to early Q1 2026 to rectify concern.

unit software does not correspond with the latest series production configuration. The head-up display control unit will receive an update to improve the displays start-up routine and how information is presented. MBUSA will conduct an OTA service campaign. Remote software updates are automatically downloaded and installed in the customers vehicle free of charge and do not require a dealer visit.

Please also see LI54.65-P-080132 for additional listed red ring causes. Cause EMF interference. Remedy Camera functionality is not affected. Cameras and displays operate normally. For vehicles with a front facing actuating camera and flap (223 and 297): 223, 297 > Install clip on ferrite magnet on M35/1, pin 3. For vehicles with rear facing camera (223, 213 Facelift, 238, 257, 290, 297): 297 > Install 2 x ferrite magnets on M35/2, pin 3 and 4. 213 Facelift, 223, 238, 257, 290 > Install on M35/2, pin 4

noticeably quieter than the rear beep when reversing. Cause SCN coding in CIVIC206 control unit A26/17 Remedy SCN code control unit A26/17 head unit.

with one of the following scenarios: Flashing without a speed limit ("- -"). Flashing when current vehicle speed is under speed limit. Flashing between US speed limit symbol and European speed limit symbol. Cause There are two identified reasons for this concern: 1. Country code information stored incorrectly at a particular geographic latitude range. 2. Incorrect reference data when the vehicle is started and a GPS signal is not immediately available. Remedy No TIPS case is necessary. Do not replace parts. A new software for the head unit is scheduled for tentative release in Q4 2025 to early Q1 2026 to rectify concern.

Cause Under analysis. Remedy To narrow down the cause, first of all remove the door trim. If the noise continues to occur even with the door trim removed, then continue the diagnosis working towards the speaker and if necessary, create a TIPS case with an informative video as an attachment. Note: Please refer to this document in the warranty claim and, once diagnosis is completed, select the damage code depending on the component part that is causing the issue. If the noise stops when the door trim is removed, please proceed in accordance with LI72.10-P-067691. Note: In this case, do not use the damage codes for the speakers in the warranty claim.

(A26/17 - MBUX multimedia system + instrument cluster (head unit)) to E333.8 / A236 904 19 00. Cause Head unit software (CIVIC206) Remedy NOTE: Do not replace any component parts A remedy is currently being developed and will be communicated once finalized. Once service is restored, the app will be available for download via the Mercedes-Benz App Store directly in the vehicle. NOTE: Please refer to this LI in the warranty claim in the "Notes" section!

(see attachment). Cause The cause is currently being investigated. Remedy 1. Update the A26/17 MBUX multimedia system (head unit) to the latest software version FUP5 Opt. (E505.4) or newer. 2. Perform a factory reset of the head unit after the update. If the issue continues: Capture a head unit log and a Body CAN trace during the occurrence of the problem. Submit both via a TIPS case to the Telematics team. Note: Only collect and submit the log and trace if the symptom can be reliably reproduced.

ONLY for vehicles with SA code (549+21U) or (549+U19). Cause Head unit software variant. Remedy For all chassis use Xentry to update head unit (A26/17). Target boot software number should be either: 247 904 6600 (E905.4) OR 247 904 7500 (E906.1) If vehicle fits all criteria and either target software is not available via Xentry, please open an XSS ticket. Damage code 5424x-01 may be used with a repair start date after June 2nd, 2025.

MBUX multimedia system software does not correspond with the latest series production configuration. The MBUX multimedia system software will receive an update to introduce new functions and improve the customer experience. Remedy MBUSA will conduct an OTA service campaign. Remote software updates are automatically downloaded and installed in the customers vehicle free of charge and do not require a dealer visit.

NOTE: Although the symptom is similar to a tire or wheel vibration, it is usually readily noticeable that it is distinctly different if it happens at all times or only while braking. Cause Although the cause of the vibration is most likely due to excessive lateral runout on the rotor or hub/wheel bearing, the system as a whole needs to be checked for other possible contributors. 1. Prior collision damage. 2. Excessive vehicle sitting times without rotating components. 3. Wheel bearing/hub lateral runout. 4. Wheel mating interface has been overtightened (did not follow WIS torque procedures). 5. Mating interfaces have been excessively modified (painted, gouged, bent, etc...). Remedy Read through the entire attached worksheet prior to performing. After performing, please review the final page and perform work accordingly. NOTE: This document is not preauthorization or otherwise dealing with warranty. This is intended for diagnostic purposes only. If there are any questions on how to proceed OR The work sheet has been performed and the vehicle has returned with the same concern. Please perform the measurements as seen in the worksheet again and open a TIPS case to the Body, Chassis, and Entertainment team.

Creaking/crackling noises from the area of the wheel bearing on the front axle when cornering/ maneuvering. Sound file attached for comparison. MUST match noise for proper diagnosis. NOTE: Steering functionality is not affected. Cause Contact area between wheel bearing and steering knuckle. See also: LI35.30-P-058566 (Throttle Lift-Off Noise - Rear) LI33.30-P-056665 (Throttle Lift-Off Noise - Front) LI40.10-P-059248 (Wheel cracking noise when cornering) Remedy 1. Perform Operation A and evaluate by testing vehicle. 2. If noise is still present after re-testing: If 192/232 chassis, verify FIN is in the listed range below in "Operation B" and perform. If not 192/232 chassis or vehicle is a 192/232 not in the listed FIN range, additional verifications of where the noise is coming from are needed. Use multiple channel NVH method to narrow down location. Verify the LI's listed above were completed or if there are other similar noises associated with the chassis (Example: 192/232 also has under panel noises and an associated LI). Operation A: 1. Clean contact surfaces of wheel bearing and steering knuckle with brake cleaner as seen in the attached pictures. NOTE: The front area of the wheel bearing and the seals must not come into contact with the cleaner, otherwise, the sealing rings will be damaged. 2. Clean threads of wheel bearing mounting. 3. Thinly coat contact surfaces of wheel bearing, steering knuckle, and axle mating face with Molykote (annular joint grease). See the attached steering knuckle and wheel hub pictures for reference. NOTE: Axle mating face greasing is also covered in LI35.30-P-058566 and LI33.30-P-056665. Operation B (Only applies to 192 and 232 in listed FIN range): Only affects vehicles up to FIN end number: Model series 192: xxx xxx xx 002 876 Model series 232: xxx xxx xx 022 312 1. Replace steering knuckle. 2. Wheel bearings do not need to be replaced.

Creaking/crackling noises from the area of the wheel bearing on the front axle when cornering/ maneuvering. Sound file attached for comparison. MUST match noise for proper diagnosis. NOTE: Steering functionality is not affected. Cause Contact area between wheel bearing and steering knuckle. See also: LI35.30-P-058566 (Throttle Lift-Off Noise - Rear) LI33.30-P-056665 (Throttle Lift-Off Noise - Front) LI40.10-P-059248 (Wheel cracking noise when cornering) Remedy 1. Perform Operation A and evaluate by testing vehicle. 2. If noise is still present after re-testing: If 192/232 chassis, verify FIN is in the listed range below in "Operation B" and perform. If not 192/232 chassis or vehicle is a 192/232 not in the listed FIN range, additional verifications of where the noise is coming from are needed. Use multiple channel NVH method to narrow down location. Verify the LI's listed above were completed or if there are other similar noises associated with the chassis (Example: 192/232 also has under panel noises and an associated LI). Operation A: 1. Clean contact surfaces of wheel bearing and steering knuckle with brake cleaner (see areas marked blue in pictures "2.jpg" and "3.jpg"). NOTE: The front area of the wheel bearing and the seals must not come into contact with the cleaner, otherwise, the sealing rings will be damaged. 2. Clean threads of wheel bearing mounting. 3. Thinly coat contact surfaces of wheel bearing, steering knuckle, and axle mating face with Molykote (annular joint grease) (see areas marked blue in pictures "2.jpg" and "3.jpg"). NOTE: Axle mating face greasing is also covered in LI35.30-P-058566 and LI33.30-P-056665. Operation B (Only applies to 192 and 232 in listed FIN range): Only affects vehicles up to FIN end number: Model series 192: xxx xxx xx 002 876 Model series 232: xxx xxx xx 022 312 1. Replace steering knuckle. 2. Wheel bearings do not need to be replaced.

Creaking/crackling noises from the area of the wheel bearing on the front axle when cornering/ maneuvering. Sound file attached for comparison. MUST match noise for proper diagnosis. NOTE: Steering functionality is not affected. Cause Contact area between wheel bearing and steering knuckle. See also: LI35.30-P-058566 (Throttle Lift-Off Noise - Rear) LI33.30-P-056665 (Throttle Lift-Off Noise - Front) LI40.10-P-059248 (Wheel cracking noise when cornering) Remedy 1. Perform Operation A and evaluate by testing vehicle. 2. If noise is still present after re-testing: If 192/232 chassis, verify FIN is in the listed range below in "Operation B" and perform. If not 192/232 chassis or vehicle is a 192/232 not in the listed FIN range, additional verifications of where the noise is coming from are needed. Use multiple channel NVH method to narrow down location. Verify the LI's listed above were completed or if there are other similar noises associated with the chassis (Example: 192/232 also has under panel noises and an associated LI). Operation A: 1. Clean contact surfaces of wheel bearing and steering knuckle with brake cleaner (see areas marked blue in pictures "2.jpg" and "3.jpg"). NOTE: The front area of the wheel bearing and the seals must not come into contact with the cleaner, otherwise, the sealing rings will be damaged. 2. Clean threads of wheel bearing mounting. 3. Thinly coat contact surfaces of wheel bearing, steering knuckle, and axle mating face with Molykote (annular joint grease) (see areas marked blue in pictures "2.jpg" and "3.jpg"). NOTE: Axle mating face greasing is also covered in LI35.30-P-058566 and LI33.30-P-056665. Operation B (Only applies to 192 and 232 in listed FIN range): Only affects vehicles up to FIN end number: Model series 192: xxx xxx xx 002 876 Model series 232: xxx xxx xx 022 312 1. Replace steering knuckle. 2. Wheel bearings do not need to be replaced.

rail Remedy Installing a 70x60x3 mm felt pad below the seat belt adjuster. The felt is supplied by the meter and must be cut to the specified dimension. Procedure: 1) Set the seat belt height adjuster to the highest position 2) Position the felt (long side, 70 mm) centrally along the folded adhesive edge of the fabric trim (see picture) Note: Bond the felt so that the height adjuster always slides over it. Otherwise, there is a risk that the felt will be pushed off when adjusting the seat belt height adjuster. Do not position the felt too high, as it may become visible on the opposite side.

Column Control Module (Valeo Parts only). To check which supplier steering column module is present in the vehicle, see attachment "Supplier Identification". Cause Triggered due to communication related software timing. Remedy New software A2239026336. Update N80 (Steering Column Module) to at least target software A2239026336, clear codes, and ignition cycle the vehicle. If DTC is still present, re-flash N80 and clear DTC's. Is DTC still present? No --> Bus sleep the vehicle. After bus sleep check for DTC again. If DTC is not present, release vehicle. Yes --> Open a TIPS case to the Body/Chassis/Entertainment inbox.

Cause Frictional vibrations with very light brake pressure/modulations. Remedy This condition can be duplicated on most vehicles. To validate, use a like for like reference vehicle. The noise is normal behavior under the conditions listed. With very light brake pressure this noise can be induced/caused due to normal brake pad and brake rotor vibrations. Exchanging brake components will not rectify.

the head bearing (support bushing) causes the noises. Remedy 1 - Check for loose metal plate by tapping your finger against the metal plate in the head bearing. See video "Rattling Noises" for reference. Metallic noises audible? Yes: Replace head bearing (support bushing). No: Replace shock-absorber strut. 2 - If the noises are still present after the head bearing (support bushing) is replaced, please replace the shock-absorber struts.

DTC's C220564 or P161447 in the Steering Column Control Module (N80). N80 supplier is "BCS". "Hardware" or "Boot Software" version number is 23/18 000 or greater. To check which supplier steering column module is in the vehicle and where to find the hardware version number. Please see attachment, "N80 Control unit identifications" Cause Triggered due to communication related software timing. Remedy Update Steering Column Module (N80) to target software A2069029314 and perform an ignition cycle. Note: If the DTC's are present after software update and ignition cycle, please create a TIPS case.

Column Control Module (Valeo Parts only). To check which supplier steering column module is present in the vehicle, see attachment "Supplier Identification". Cause Triggered due to communication related software timing. Remedy New software A2239026336. Update N80 (Steering Column Module) to target software A2239026336 and perform ignition cycle. Note: If the DTC is present after software update and ignition cycle, please create a TIPS case

Creaking/crackling noises from the area of the wheel bearing on the front axle when cornering/ maneuvering. Sound file attached for comparison. MUST match noise for proper diagnosis. NOTE: Steering functionality is not affected. Cause Contact area between wheel bearing and steering knuckle. See also: LI35.30-P-058566 (Axle Half Shaft noise when changing direction - Front) LI33.30-P-056665 (Axle Half Shaft noise when changing direction - Rear) LI40.10-P-059248 (Wheel cracking noise when cornering) Remedy 1. Perform Operation A and evaluate by testing vehicle. 2. If noise is still present, perform Operation A again. 3. If noise is still present after re-testing, perform Operation B. Operation A: 1. Clean contact surfaces of wheel bearing and steering knuckle with brake cleaner (see areas marked blue in pictures "2.jpg" and "3.jpg"). NOTE: The front area of the wheel bearing and the seals must not come into contact with the cleaner, otherwise, the sealing rings will be damaged. 2. Clean threads of wheel bearing mounting. 3. Thinly coat contact surfaces of wheel bearing, steering knuckle, and axle mating face with Molykote (annular joint grease) (see areas marked blue in pictures "2.jpg" and "3.jpg"). NOTE: Axle mating face greasing is also covered in LI35.30-P-058566 and LI33.30-P-056665. Operation B (Only applies to 192 and 232 in listed FIN range above): 1. Replace steering knuckle. 2. Wheel bearings do not need to be replaced.

Sound file attached for comparison. NOTE: Steering functionality is not affected. For 192 and 232: Only affects vehicles in the below FIN range. FIN range up to: Model series 192: xxx xxx xx 002 876 Model series 232: xxx xxx xx 022 312 Cause Contact area between wheel bearing and steering knuckle. See also: LI35.30-P-058566 (Axle Half Shaft noise when changing direction - Front) LI33.30-P-056665 (Axle Half Shaft noise when changing direction - Rear) LI40.10-P-059248 (Wheel cracking noise when cornering) Remedy 1. Perform Operation A and evaluate by testing vehicle. 2. If noise is still present, perform Operation A again. 3. If noise is still present after re-testing, perform Operation B. Operation A: 1. Clean contact surfaces of wheel bearing and steering knuckle with brake cleaner (see areas marked blue in pictures "2.jpg" and "3.jpg"). NOTE: The front area of the wheel bearing and the seals must not come into contact with the cleaner, otherwise, the sealing rings will be damaged. 2. Clean threads of wheel bearing mounting. 3. Thinly coat contact surfaces of wheel bearing, steering knuckle, and axle mating face with Molykote (annular joint grease) (see areas marked blue in pictures "2.jpg" and "3.jpg"). NOTE: Axle mating face greasing is also covered in LI35.30-P-058566 and LI33.30-P-056665. Operation B (Only applies to 192 and 232 in listed FIN range above): 1. Replace steering knuckle. 2. Wheel bearings do not need to be replaced.

OR Rattling, humming, dry sliding/gravel noise from the electric steering system when steering (see attachment). Complaint does not impact the ability to safely steer or control the vehicle. Cause Ball screw drive (KGT) of electric steering damaged by: 1. External force due to: Hitting the curb/posts with the front wheels. Driving over obstacles (e.g. pothole/ threshold/ speed bump/ gully) at an inappropriate speed. 2. Corrosion/ water ingress through a damaged boot (see attachment). Cracks (1) High pressure cleaner (2) Animal bite (3) See various examples listed in the attachments for examples of outside influence. Remedy Remove boot clamps closest to steering gear housing on both left and right (as seen in "Steering Rack Boot Clamp Location"). Pull back boot and inspect for rust, broken end stops, water, or any other anomalies. Replace electric steering. Note: Steering gears replaced due to outside influence or damage must not be claimed under warranty!

236.17 due to a global supply constraint. 236.17 ATF 1L and 5L (PNs: A002989060312 and A002989060313) bottles are out of stock or in limited supply at Zep. This LI has been created with the following intention: - Provide dealers with additional workshop-focused guidance regarding the current ATF 236.17 supply constraint and the planned introduction of ATF 236.18. - Supplement existing communications and address common workshop questions related to maintenance, repairs, and fluid applicability. - Provide technical clarification and practical workshop guidance during the temporary supply constraint period. Dealers should continue to reference the latest News Channel Updates (NCUs) for the most current information regarding availability, ordering processes, supply status, and other related updates. Cause Damage to the Shell production facility has resulted in 236.17 oil supply being reduced to 50% of normal output until the end of 2026. Remedy Please first check Latest NCU updates for latest detailed information. Please continue placing orders through Paragon as normal. Supply is expected to remain reduced and allocation measures are currently in place. We ask for your patience through this restricted supply period. Most orders will be filled in the order in which they were received, as supply is replenished. Those dealers with zero inventory, and pending orders, will receive priority. We expect supply to be stabilized in September 2026. Approved Fluids: Only use transmission fluid from the approved list found on the Mercedes-Benz Operating Fluids website. Non-approved fluid will result in mechanical damage to the transmission and must be avoided. https://operatingfluids.mercedes-benz.com/sheet/236.17 Approved fluids can be claimed as follows if there is no Mercedes-Benz part number: Part # ATFSUB1L - TRANSMISSION FLUID 1 LITER ATFSUB5L - TRANSMISSION FLUID 5 LITER Dealerships with Zero Inventory AND Grounded Vehicles: If a vehicle is currently grounded for repair at your dealer due to no 236.17 inventory, we may be able to expedite your order. Please open a StarSupport ticket including the following information: (Parts Related Inquiry>National Accounts>Zep) LI document number Short explanation of repair needed for grounded vehicle Current days down of RO Maintenance and Service Interval Guidance Published maintenance intervals remain unchanged. Vehicles should continue to be maintained in accordance with the applicable maintenance schedule. This LI does not revise or extend any published maintenance interval requirements. If all required parts and materials are not available prior to scheduling or beginning a transmission service, dealers should consider postponing routine preventative transmission maintenance until the necessary parts become available. For vehicles that have not yet reached the applicable maintenance interval and do not exhibit transmission-related concerns, there is no need to recommend preventative transmission services prior to the scheduled maintenance interval. When evaluating whether routine transmission maintenance can be deferred until parts become available, dealers should consider: Overall vehicle condition Vehicle usage and operating conditions Presence of transmission-related symptoms or customer complaints Customer expectations and vehicle operating requirements Availability of required parts and materials Introduction of New Fluid Specification 236.18 Mercedes-Benz is currently preparing the introduction of ATF 236.18 as an additional approved transmission fluid solution for applicable NAG3 transmissions. At the time of publication of this LI, ATF 236.18 is not yet available for dealer ordering or workshop use in the U.S. market. See attachment for further details.

Commonly used acronyms in LI's and TIPS cases. Control unit names, numbers, and how to identify. Network/wiring architecture groups to baumuster quick reference. Platform to baumuster quick reference. Cause Information only Remedy Acronyms: AV = Actual Values CPR = Car Package Release (For MB.OS) CU = Control Unit CUL = Control Unit Log DTC = Diagnostic Trouble Code E-Stand = Fresh-up head unit boot software (found in head unit control unit log) FUP = Fresh-up FW = Firmware HSVL = High Speed Video Line HU = Head Unit HW = Hardware IPD = Injector Performance Data ISU = Initial Start Up LVDS = Low Voltage Differential Signal NAG"x" = New Automatic Gearbox ("x" is the generation number, example: NAG3) NSFT = Not Safe For Transport MOPF = Model Facelift (Ex: 167 MOPF) PiH = Plug-in Hybrid SA Code = Sonderausstattungscode (Option Code) SCN = Software Calibration Number SW = Software TCU = Telecommunication Control Unit (Hermes/Ramses/Etc...) QT = Quicktest XD = XENTRY Diagnosis Control Unit Identification: Refer to the attachment "Control Unit Nomenclature" for location of each. Control Unit Name Control Unit Number Control Unit Short name Control Unit Diogenes ("dy-oj-uh-neez") name - Control unit variant/family. Network/Wiring Architecture to Baumuster Quick Reference: Star 1 117, 156, 246 (MFA) 166, 176, 221, 242, 246, 292 906 Star 2 205, 213, 238, 253, 257, 290 (MRA) 117, 156, 246 (MFA) 118, 177, 243, 247 (MFA2) 167, 222, 292, 463, 465 907 Star 3 294, 295, 296, 297 (EVA2) 206, 214, 223, 236, 254 (MRA2) 192 and 232 (MSA) Star 3.5 174 178 Platform to Baumuster Quick Reference: MRA = "Mercedes-Benz Rearwheel Architecture": 205 213 222 238 253 257 290 MRA2 = "Mercedes-Benz Rearwheel Architecture - Generation 2": 206 214 223 236 254 MFA = "Mercedes-Benz Frontwheel Architecture" 117 156 246 MFA2 = "Mercedes-Benz Frontwheel Architecture - Generation 2" 118 177 243 247 EVA1.5 = "Electric Vehicle Architecture" 243 EVA2 = "Electric Vehicle Architecture - Generation 2" 294 295 296 297 MSA = "Mercedes-Benz Sport Architecture" 192 232 MMA = "Mercedes-Benz Modular Architecture" 174 178

Commonly used acronyms in LI's and TIPS cases. Control unit names, numbers, and how to identify. Network/wiring architecture groups to baumuster quick reference. Platform to baumuster quick reference. Cause Information only Remedy Acronyms: AV = Actual Values CU = Control Unit CUL = Control Unit Log DTC = Diagnostic Trouble Code E-Stand = Fresh-up head unit boot software (found in head unit control unit log) FUP = Fresh-up FW = Firmware HSVL = High Speed Video Line HU = Head Unit HW = Hardware IPD = Injector Performance Data ISU = Initial Start Up LVDS = Low Voltage Differential Signal NAG"x" = New Automatic Gearbox ("x" is the generation number, example: NAG3) NSFT = Not Safe For Transport MOPF = Model Facelift (Ex: 167 MOPF) PiH = Plug-in Hybrid P3 Hybrid = AMG Plug-in Hybrid with rear drive unit SA Code = Sonderausstattungscode (Option Code) SCN = Software Calibration Number SW = Software TCU = Telecommunication Control Unit (Hermes/Ramses/Etc...) QT = Quicktest XD = XENTRY Diagnosis Control Unit Identification: Refer to the attachment "Control Unit Nomenclature" for location of each. Control Unit Name Control Unit Number Control Unit Short name Control Unit Diogenes ("dy-oj-uh-neez") name - Control unit variant/family. Network/Wiring Architecture to Baumuster Quick Reference: Star 1 117, 156, 246 (MFA) 166, 176, 221, 242, 246, 292 906 Star 2 205, 213, 238, 253, 257, 290 (MRA) 117, 156, 246 (MFA) 118, 177, 243, 247 (MFA2) 167, 222, 292, 463, 465 907 Star 3 294, 295, 296, 297 (EVA2) 206, 214, 223, 236, 254 (MRA2) 192 and 232 (MSA) Star 3.5 174 178 Platform to Baumuster Quick Reference: MRA = "Mercedes-Benz Rearwheel Architecture": 205 213 222 238 253 257 290 MRA2 = "Mercedes-Benz Rearwheel Architecture - Generation 2": 206 214 223 236 254 MFA = "Mercedes-Benz Frontwheel Architecture" 117 156 246 MFA2 = "Mercedes-Benz Frontwheel Architecture - Generation 2" 118 177 243 247 EVA1.5 = "Electric Vehicle Architecture" 243 EVA2 = "Electric Vehicle Architecture - Generation 2" 294 295 296 297 MSA = "Mercedes-Benz Sport Architecture" 192 232 MMA = "Mercedes-Benz Modular Architecture" 174 178

Commonly used acronyms in LI's and TIPS cases. Control unit names, numbers, and how to identify. Network/wiring architecture groups to baumuster quick reference. Platform to baumuster quick reference. Cause Information only Remedy Acronyms: AV = Actual Values CU = Control Unit CUL = Control Unit Log DTC = Diagnostic Trouble Code E-Stand = Fresh-up head unit boot software (found in head unit control unit log) FUP = Fresh-up FW = Firmware HSVL = High Speed Video Line HU = Head Unit HW = Hardware IPD = Injector Performance Data ISU = Initial Start Up LVDS = Low Voltage Differential Signal NAG"x" = New Automatic Gearbox ("x" is the generation number, example: NAG3) NSFT = Not Safe For Transport MOPF = Model Facelift (Ex: 167 MOPF) PiH = Plug-in Hybrid P3 Hybrid = AMG Plug-in Hybrid with rear drive unit SA Code = Sonderausstattungscode (Option Code) SCN = Software Calibration Number SW = Software TCU = Telecommunication Control Unit (Hermes/Ramses/Etc...) QT = Quicktest XD = XENTRY Diagnosis Control Unit Identification: Refer to the attachment "Control Unit Nomenclature" for location of each. Control Unit Name Control Unit Number Control Unit Short name Control Unit Diogenes ("dy-oj-uh-neez") name - Control unit variant/family. Network/Wiring Architecture to Baumuster Quick Reference: Star 1 117, 156, 246 (MFA) 166, 176, 221, 242, 246, 292 Star 2 205, 213, 238, 253, 257, 290 (MRA) 117, 156, 246 (MFA) 118, 177, 243, 247 (MFA2) 167, 222, 292, 463, 465, 906 Star 3 294, 295, 296, 297 (EVA2) 206, 214, 223, 236, 254 (MRA2) 192 and 232 (MSA) 907 Platform to Baumuster Quick Reference: MRA = "Mercedes-Benz Rearwheel Architecture": 205 213 222 238 253 257 290 MRA2 = "Mercedes-Benz Rearwheel Architecture - Generation 2": 206 214 223 236 254 MFA = "Mercedes-Benz Frontwheel Architecture" 117 156 246 MFA2 = "Mercedes-Benz Frontwheel Architecture - Generation 2" 118 177 243 247 EVA1.5 = "Electric Vehicle Architecture" 243 EVA2 = "Electric Vehicle Architecture - Generation 2" 294 295 296 297 MSA = "Mercedes-Benz Sport Architecture" 192 232 MMA = "Mercedes-Benz Modular Architecture" 174

No camera image is displayed in the head unit. The reversing camera or the 360 system functions normally when activated manually or by engaging drive range "R". Cause This is not a malfunction, but an intended system behavior. Calibration of the reversing camera is in progress. The calibration is completed by: Opening the camera cover for a maximum of 5 cumulative minutes. If the vehicle speed is < 35 km/h (<22 MPH). The steering wheel angle is < 10. If calibration is aborted by exceeding one of the above conditions, the camera retracts and the calibration will re-attempt once the conditions are achieved and the speed returns to the range of 18 km/h (~11 MPH). Remedy SCN code PARK213M on MFA2 facelift vehicles produced after 09/2024 (A-Class, CLA, GLA, etc...) so the complete calibration speed window is available. For vehicles with PARK213M or PARK223 a calibration is completed successfully by: Driving forward (typically less than 1 minute). Vehicle speed is < 35 km/h (<22 MPH). The steering wheel angle is < 10. During daylight. Without a vehicle following too closely (camera must be able to see asphalt). When calibration has completed successfully, the camera door closes automatically for the rest of the driving cycle. The camera will now only open if the customer requests (Example: Engaging reverse gear). The calibration of the camera will re-initiate every drive cycle (ignition change). The customer can generally perform calibration at the first attempt while briefly maintaining a speed range of 15 km/ h (~9 MPH) and 35 km/h (~22 MPH). The customer can therefore play a significant role in reducing the camera door noise and actuation frequency.

It may be mistaken for a hard brake engagement Cause Poor learning of brake B06 adaptation values over time. Remedy Short-term remedy: 1. Perform IPR and follow the instructions. 2. Perform resetting of deceleration values (VGS > Special Procedures > Special procedure > Resetting learned values Deceleration mode) 3. Perform standard adaptation 4. Reevaluate the concern and release vehicle if no longer present Note: ALL steps (resetting learned values and standard adaptation) must be completed to fully resolve the complaint. Long-term measure: Aftersales software is currently in development.

The clunk is heard once when changing from forward to reverse (and vice versa). Note: Sound file in attachment Cause If the complaint is eliminated by experimentally loosening the outboard collar nut (by 1 turn), the problem is due to micromovement in the connection between the wheel bearing inner race and the joint housing of the side shaft. Note: The collar nut must always be replaced after being loosened and must be tightened to the specified torque. Remedy Coat contact surface of side shaft with wheel bearing with Molykote paint. To do this, proceed as follows: 1. Remove outboard side shafts (extract outer joint gearing from wheel hub) 2. Clean contact surface A (see image file in attachment "Outer joint housing before") before coating with Molykote, using "spirit" (free of dust and grease) 3. Coat contact surface A (see image file in attachment "Outer joint housing after") using Molykote and leave to dry for one hour in removed condition 4. Reinstall side shafts

The clunk is heard once when changing from forward to reverse (and vice versa). Cause If the complaint is eliminated by experimentally loosening the outboard collar nut (by 1 turn), the problem is due to micromovement in the connection between the wheel bearing inner race and the joint housing of the side shaft. Note: The collar nut must always be replaced after being loosened and must be tightened to the specified torque. Remedy Coat contact surface of side shaft with wheel bearing with Molykote paint. To do this, proceed as follows: 1. Remove outboard side shafts (extract outer joint gearing from wheel hub) 2. Clean contact surface A (see image file in attachment "Outer joint housing before") before coating with Molykote, using "spirit" (free of dust and grease) 3. Coat contact surface A (see image file in attachment "Outer joint housing after") using Molykote and leave to dry for one hour in removed condition 4. Reinstall side shafts Note: Before using the antifriction coating (Molykote), stir it or shake it thoroughly for (at least 1 minute).

The noise is heard once in each instance when changing direction of travel. Note: Sound file in attachment Cause If the complaint is eliminated by experimentally loosening the outboard collar nut (by 1 turn), the problem is due to cracking of the microweld between the wheel bearing inner race and the joint housing of the side shaft. Note: The collar nut must always be replaced after being loosened. See also LI33.20-P-078406 Remedy Coat contact surface of side shaft with wheel bearing with Molykote paint. To do this, proceed as follows: 1. Remove side shafts 2. Clean contact surface A (see image file in attachment "Outer joint housing before") before coating with Molykote, using "spirit" (free of dust and grease) 3. Coat contact surface A (see image file in attachment "Outer joint housing after") with Molykote and leave to dry for "one hour" in removed condition 4. Reinstall side shafts Note: Before using the antifriction coating (Molykote), stir it or shake it thoroughly for (at least 1 minute).

squeaking, chattering, shuddering B: The windshield is not wiped completely (streaking) C: During the downward movement water is pulled back onto the windshield from the A-pillar (Figure 1) D: After windshield cleaning, water keeps spraying onto the windshield for several wipe cycles (Figure 2) A1: The windshield and wiper blades are contaminated with residues from car washing facilities, identifiable by the water beading. The resulting differences in the friction values between the wiper blades and the windshield can excite the wiper blades to vibrate. Note: It is mostly wax residue from the washer system, but also water-repellent nano-particle coating for paint and/or silicone-based washer fluid, that could cause this problem. A partially dry windshield also has different friction values, which can likewise result in squeaking of the wiper blades A2: The wiper blades are worn by mechanical damage (wiper lip damaged by ice or insect debris, or deformed by long periods of disuse). A3: Incorrect angle of incidence of the wiper arms to the windshield. Because of this, the rubber lip of the wiper blade may not flip over at the reversal point. Cause B: B1: Wax/ dirt residues on the windshield B2: Wiper blades deformed or worn B3: Downforce of wiper arm not OK (Figure 3) Cause C: Water is pulled back onto the windshield by the differential pressure created as the wiper arm moves downwards. Cause D: Washer water collects in the fastening of the wiper blade and is blown onto the windshield by the airstream over several wipe cycles. Note and supporting information: Wiper blades are wear parts which, even when "not used" for long periods (kept in park position), may become permanently deformed and damaged. Further stresses on the rubber wiper blade arise due to various environmental influences which progressively change the effectiveness of the rubber wiper blade and accelerate the aging process. Due to the natural aging process and wear, the wiper blades should be replaced twice a year, preferably in Spring and Fall (see operator's manual). Remedy Remedy A: A1: Cleaning entire windshield with A 000 986 40 71. A2: Checking water's flow behavior after windshield has been cleaned (see Video 1). If, after cleaning, there are still areas with water beading, then the cleaning process must be carried out again until a rejection reaction is no longer present. Note: On the vehicle in the video (Video 1), water still beads on the bottom left of the windshield. The windshield is still not properly clean, even though it appears to be clean. The windshield is only properly clean when there are no more areas on the windshield where water beads. A3: Replace wiper blades with genuine wiper blades. Important: Only exchange wiper blades if windshield no longer has water-repellent areas Note: Replacement of wiper blades is not covered under warranty and can be replaced at the expense of the customer. Remedy B: B1: Clean windshield with intensive cleaner A 000 986 40 71. Important: Do not clean the wiper blades otherwise the graphite coating will be damaged. B2: Replace wiper blades with genuine wiper blades Note: Replacement of wiper blades is not covered under warranty and can be replaced at the expense of the customer. B3: Check the wiper arm for excessive resistance in the bearing. Restore mobility or replace wiper arm if necessary. Remedy C: Problem inherent in design for which there is no technical remedy. Exception: X204 up to 02/2014. In these vehicles, it is possible to install the design configuration of vehicles as of 02/2014. This includes wiper arms (styled arms) with improved behavior in this respect. It is also necessary to replace the wiper blades because the styled arms feature a Top Lock connection (previously Side Lock).

Cause: Missing helical spring shim (blue part as shown in attached picture "Helical Spring Shim"). Remedy: Check whether the blue helical spring shim is installed. If NOT present: Install the spring shim. Replacement part is black. If present: Replace the blue shim with the aftersales part black shim. If noise is still not remedied after replacing shims, provide sound/video file to the Body, Chassis and Entertainment inbox.

Cause Most reported USB port issues are due to improper use or contamination. Note: Any repair costs must be discussed with the customer beforehand. Common external factors identified include: Fluid intrusion Broken bushings or physical damage See attachments. Remedy If a component needs replacement but shows no visible external damage, submit a detailed TIPS case only when technical support is required. Include details of all connected external devices (such as charging cables, USB drives, and hard drives). If diagnostic results directly indicate component replacement, a TIPS case is not necessary.

Cause Most reported USB port issues are due to improper use or contamination. Note: Any repair costs must be discussed with the customer beforehand. Common external factors identified include: Fluid intrusion Broken bushings or physical damage See attachments. Remedy If a component needs replacement without visible external damage, submit a detailed TIPS case. Include information on all connected external devices (e.g., charging cables, USB drives, hard drives).

Cause Missing helical spring shim (blue part as shown in attached picture "Helical Spring Shim"). Remedy Check whether the blue helical spring shim is installed. If NOT present: Install the spring shim. If present: Provide sound/video file with matching noise, verification of no installed spring shim via picture, and open a TIPS case referencing this LI.

The noise is heard once in each instance when changing direction of travel. Note: Sound file in attachment Cause If the complaint is eliminated by experimentally loosening the outboard collar nut (by 1 turn), the problem is due to cracking of the microweld between the wheel bearing inner race and the joint housing of the side shaft. Note: The collar nut must always be replaced after being loosened. See also LI33.20-P-078406 Remedy Coat contact surface of side shaft with wheel bearing with Molykote paint. To do this, proceed as follows: 1. Remove side shafts 2. Clean contact surface A (see image file in attachment "Outer joint housing before") before coating with Molykote, using "spirit" (free of dust and grease) 3. Coat contact surface A (see image file in attachment "Outer joint housing after") with Molykote and leave to dry for "one hour" in removed condition 4. Reinstall side shafts Note: Before using the antifriction coating (Molykote), stir it or shake it thoroughly for (at least 1 minute).

existing stock must be returned to your facing PDC. The deadline for all dealer returns is no later than Thursday, July 23rd, 2026. After July 23rd, returns of these parts will no longer be accepted. These parts should be returned via ZSR Special Return, using item category SCM Authorized Part Return. Please include a copy of this NCU as your authorization to return these parts. This procedure will not affect your return allowance. All returned parts will be replaced in accordance with the chart provided below.

existing stock must be returned to your facing PDC. The deadline for all dealer returns is no later than Thursday, June 18, 2026. After June 18th, returns of these parts will no longer be accepted. These parts should be returned via ZSR Special Return, using item category SCM Authorized Part Return. Please include a copy of this NCU as your authorization to return these parts. This procedure will not affect your return allowance. All returned parts will be replaced in accordance with the chart provided below.

software for the Headlamp Range (HLI) control unit does not correspond to the latest series production configuration. As a result, adaptive lighting functions may not be available. Additionally, the following instrument cluster message may appear: "Adaptive High Beam Assist is not available" or "Digital Light: Functionality limited" MBUSA will conduct an OTA service campaign. Remote software updates are automatically downloaded and installed in the customers vehicle free of charge and do not require a dealer visit.

if Digital Extra: Active Distance Assist DISTRONIC (207) has already been activated/purchased via the application. Cause On some vehicles with Digital Extra: Active Distance Assist DISTRONIC (code 207), it may be that the function cannot be enabled via the application or is no longer available in the "vehicle back end". Remedy Please open a case with the Customer Care Center ("CCC") to reactivate function on the "vehicle back end".

The updated software improves system stability and enhances the robustness of the driver assistance system. MBUSA will conduct an OTA service campaign. Remote software updates are automatically downloaded and installed in the customers vehicle free of charge and do not require a dealer visit.

The updated SCN coding improves system stability and enhances the availability of driver assistance features. MBUSA will conduct an OTA service campaign. Remote SCN coding updates are automatically downloaded and installed in the customers vehicle free of charge and do not require a dealer visit.

interference/background noises are audible to the called party during a call. It becomes increasingly difficult to understand as the speed rises. Cause A. Seating of the microphones in the headliner. Side edges are covered by the textile cover (see picture "1") B. Assembly of microphones (B25/20 or B25/21) in the headliner. C. Dirt inside the microphone housing Remedy 1. Press finger on rear of microphone (on adhesive tape) 2. Remove microphone cap from the front 3. Eliminate protruding material residues of the microphone cutout at the headliner, e.g. with a soldering iron. The microphone must be seated in the headliner as shown in picture "2". 4. Push microphone from behind until it is firmly pressed into the headliner 5. Maintain pressure and press/clip cap into microphone from the front. Note: The cover cap must be clearly heard and felt to engage. 6. This procedure must be carried out on both microphones (B25/20 and B25/21) Note: It is recommended to replace the cover caps. The non-woven cloth in the cover cap protects the microphone from soiling and must not be removed. NOTE: The information contained in this document is intended for use by trained, professional technicians with the knowledge to properly and safely perform diagnosis and repairs on Mercedes-Benz vehicles, using Mercedes-Benz approved tools and equipment. It informs service technicians about conditions that could occur in certain vehicles and provides information that could assist in proper vehicle diagnosis, service, or repair. It does not indicate that a defect is present in any vehicle referenced in this document nor does it imply warranty coverage. DO NOT assume that a symptom or condition, or a described cause of a symptom or condition, affects any particular vehicle or groups of vehicles, or that a described repair applies to any particular vehicle or groups of vehicles. There can be multiple causes resulting in the same or similar symptoms or conditions described in this document, and trained professional service technicians must use their diagnostic skills to make evaluations on a case-by-case basis. The information contained in this document does not guarantee warranty coverage nor does it extend the vehicles warranty in any way.

If not exactly as listed below, there is no need to create a TIPS case referencing this LI unless further assistance is needed outside of this document. Conditions Instrument Cluster Message: "Park Assist Inoperative" and Hardware part numbers: A0009019716 or A0009016022 B223263 with Bosch-ID C259; A+S (Active and Stored) and B223255 with Bosch-ID 1B5D; A+S (Active and Stored) Notes: Other DTC's are permitted but the above three conditions must be met. If they are not met, this LI is not applicable. See attachment "LI Criteria" for an example. Attachment portrays a quick test with non-matching criteria and therefore does not require a TIPS case. Cause Under analysis. Remedy Please do not make any attempts to repair the park control unit. Do not flash or SCN code. Open a TIPS case.

Cause The cause is currently being investigated. Remedy A remedy is currently not available. A software update in the seat control unit does not solve the problem. The document will be updated once the reason has been analyzed and a remedy is available.

with one of the following scenarios: Flashing without a speed limit ("- -"). Flashing when current vehicle speed is under speed limit. Flashing between US speed limit symbol and European speed limit symbol. Cause Under Investigation Remedy Under investigation. One option is to turn off Traffic Sign Assist until the investigation is completed. Once completed this LI will be updated. No TIPS case is necessary. Do not replace parts.

If not exactly as listed below, there is no need to create a TIPS case referencing this LI unless further assistance is needed outside of this document. Conditions Instrument Cluster Message: "Park Assist Inoperative" and Hardware part numbers: A0009019716 or A0009016022 B223263 with Bosch-ID C259; A+S (Active and Stored) and B223255 with Bosch-ID 1B5D; A+S (Active and Stored) Notes: Other DTC's are permitted but the above three conditions must be met. If they are not met, this LI is not applicable. See attachment "LI Criteria" for an example. Attachment portrays a quick test with non-matching criteria and therefore does not require a TIPS case. Cause Under analysis. Remedy Please do not make any attempts to repair the park control unit. Do not flash or SCN code. Open a TIPS case.

If not exactly as listed below, there is no need to create a TIPS case referencing this LI unless further assistance is needed outside of this document. Conditions Instrument Cluster Message: "Park Assist Inoperative" and B223263 with Bosch-ID C259; A+S (Active and Stored) and B223255 with Bosch-ID 1B5D; A+S (Active and Stored) Notes: Other DTC's are permitted but the above three conditions must be met. If they are not met, this LI is not applicable. See attachment "LI Criteria" for an example. Attachment portrays a quick test with non-matching criteria and therefore does not require a TIPS case. Cause Under analysis. Remedy Please do not make any attempts to repair the park control unit. Do not flash or SCN code. Open a TIPS case.

If not exactly as listed below, there is no need to create a TIPS case referencing this LI unless further assistance is needed outside of this document. Conditions Instrument Cluster Message: "Park Assist Inoperative" and B223263 with Bosch-ID C259; A+S (Active and Stored) and B223255 with Bosch-ID 1B5D; A+S (Active and Stored) Notes: Other DTC's are permitted but the above three conditions must be met. See Attachment for an example of Bosch ID location. Attachment portrays a quick test with non-matching criteria and therefore does not require a TIPS case. Cause Under analysis. Remedy Please do not make any attempts to repair the park control unit. Do not flash or SCN code. Open a TIPS case.

The discoloration is typically visible along the upper surface of the handle. Cause Insufficient surface treatment of the black chrome from the supplier Remedy 1.) Clean door handles. 2.) Inspect the handle after cleaning. Confirm that the discoloration remains clearly visible across the upper portion of the handle. Compare the condition to the LI reference photos 3.) If the discoloration matches the fault profile shown in the reference photos replace the affected retractable door handle.

70x15x3 mm felt strip next to the air duct under the substructure. The felt is supplied by the meter and must be cut to the specified dimension. Procedure: 1) Lift the substructure (black). 2) Install the felt lengthwise below the substructure on the B-pillar trim. Note: The felt must be installed as far under the substructure as possible. A second person is recommended to assist when bonding the felt.

TIREFIT sealant bottle may not meet specifications. The possibility exists that the sealant bottle may leak or may have otherwise been removed from the vehicle. MBUSA will conduct a service campaign. An authorized Mercedes-Benz dealer will replace the TIREFIT bottle in the trunk.

strip control unit does not correspond to current production specifications. As a result, the ambient lighting on the left front door, right front door, and cockpit may exhibit brief flickering. MBUSA will conduct a service campaign. An authorized Mercedes-Benz dealer will update the software on the LED strip control unit.

Cause Many possible root causes Remedy *Note - This Li does not apply if there are other Li's that apply to your concern OR you have a fault and/or guided test that leads to a root cause. AC Diagnosis (General) Initial Steps Verify Customer Concern Confirm the issue reported by the customer. Compare to Like Vehicle Determine if the behavior is normal by comparing with a similar vehicle. Determine Your Game and Players Identify the diagnostic strategy and involved components/systems. Testing Perform relevant diagnostic tests. Refrigerant Quantity Record the amount of refrigerant recovered and compare it to the specified value (if applicable). Forming Gas is the ONLY approved leak test method. (DYE is NOT approved) TIPS Case Submission Requirements/Warranty Claim Submission Requirements (Template attached to be used for submission of Warranty claim and/or TIPS case) Cooling Capacity Test (If System Has a Charge) *Note - TIPS case is only required if the root cause is not identified or other Li's/documents require a case to be open. Before Repairs Gauge Readings High and Low pressure readings (from machine or separate gauges). Leak Detection (if applicable) PPM of any leaks found. XENTRY Printouts Climate control AVs. HV compressor AVs (for heat and AC systems). Thermometer Readings Left and right dash vents. Center vent, footwell, and/or rear vents (if concern is localized). Ambient Conditions Temperature and humidity from OCP AVs (if available). After Repairs Gauge Readings High and Low pressure readings before and after repairs. Thermometer Readings Left and right dash vents before and after. Center vent, footwell, and/or rear vents before and after (if localized concern). Documentation Complaint Analysis, Game/Players, and Testing Steps. Include expected results and technical justification for the diagnosis. Avoid listing R/I stepsfocus on diagnostic reasoning and root cause. All prior measurements need to be documented on the repair order. OP code usage: 831232 - Max .5 for Cooling Capacity Test 831040 - Only to be utilized if you have a fault code and are actively diagnosing that fault code (MAX 1 hour) 831762 - This includes basic leak check 831285 - This can only be used in extenuating circumstances where a leak cannot be found (MAX 1 hour)

Cause Many possible root causes Remedy AC Diagnosis (General) Initial Steps Verify Customer Concern Confirm the issue reported by the customer. Compare to Like Vehicle Determine if the behavior is normal by comparing with a similar vehicle. Determine Your Game and Players Identify the diagnostic strategy and involved components/systems. Testing Perform relevant diagnostic tests. Refrigerant Quantity Record the amount of refrigerant recovered and compare it to the specified value (if applicable). Forming Gas is the ONLY approved leak test method. (DYE is NOT approved) TIPS Case Submission Requirements/Warranty Claim Submission Requirements Cooling Capacity Test (If System Has a Charge) *Note - TIPS case is only required if the root cause is not identified or other Li's/documents require a case to be open. Before Repairs Gauge Readings High and Low pressure readings (from machine or separate gauges). Leak Detection (if applicable) PPM of any leaks found. XENTRY Printouts Climate control AVs. HV compressor AVs (for heat and AC systems). Thermometer Readings Left and right dash vents. Center vent, footwell, and/or rear vents (if concern is localized). Ambient Conditions Temperature and humidity from OCP AVs (if available). After Repairs Gauge Readings High and Low pressure readings before and after repairs. Thermometer Readings Left and right dash vents before and after. Center vent, footwell, and/or rear vents before and after (if localized concern). Documentation Complaint Analysis, Game/Players, and Testing Steps. Include expected results and technical justification for the diagnosis. Avoid listing R/I stepsfocus on diagnostic reasoning and root cause. All prior measurements need to be documented on the repair order. OP code usage: 831232 - Max .5 for Cooling Capacity Test 831040 - Only to be utilized if you have a fault code and are actively diagnosing that fault code (MAX 1 hour) 831762 - This includes basic leak check 831285 - This can only be used in extenuating circumstances where a leak cannot be found (MAX 1 hour)

to: Summer heat Direct sunlight Lack of air conditioning or ventilation Camera enters self-protection mode to prevent overheating. Remedy Do NOT replace any parts. The driver camera (NTG7: MDC295; CIVIC.i2: CIVIC206) is operating as designed. Allow the interior to cool down. If the message remains after cooling: Run XENTRY Diagnosis Check latest software for Actuation of Driver Camera (A26/17) No TIPS case required.

sound does not meet the customer's expectations. Changing the sound settings, for example for the bass, does not provide the desired effect. Cause Sound parameter software in the A26/17 - MBUX multimedia system + Instrument cluster (Head unit) control unit Remedy For vehicles with standard sound and Midline sound system (code 853), new sound parameters are available. V/X 254: A 254 903 94 03 C 254: A 254 903 97 03 V/W 206: A 206 903 20 04 S 206: A 206 903 21 04 A/C 236: A 236 903 86 01 V/W 214: A 214 903 19 03 S 214: A 214 903 20 03 To update the sound parameters, please perform an update to the software for the A26/17 - MBUX multimedia system + Instrument cluster (Head unit) control unit.

Cause Noises may come from one or more sleeves of the horn contact plate. Remedy Remove the horn contact plate and check the sleeves for noise; see attached video. If necessary, apply lubricant to the sleeves.

instrument cluster upon vehicle start-up, prior to driving. No fault codes stored in the rear axle steering control unit N68/4. Cause Asynchronous start-up of control units in the vehicle. Remedy The message clears once the head unit receives the rear axle steering signal. Perform a software update to A26/17 control unit - MBUX multimedia system + instrument cluster (head unit) CIVIC206; the software version must be at least 333.8. NOTE: To verify the head unit is on the correct software version: Navigate to A26/17 (Head Unit) Control Unit Log. Locate "Control Unit Specific Data" near the bottom. Verify "E-Stand" number is at least 333.8.

See arrow direction in attached pictures. Cause Slipped thrust bearing ring on the height adjustment. Remedy Install repair kit for height adjustment of the steering column. For tightening torque, see attachment.

a new software release for the MBUX Infotainment system. An OTA update will enhance both functionality and entertainment features. The update introduces Dolby Atmos support for in-car apps, improvements to the MBUX calendar app, and the launch of MBUX SOUND DRIVE. To deliver a better music streaming experience, new apps will be installed and existing integrations with online streaming providers will be removed. Each provider will now require a separate app, which will be installed during the update. MBUSA will conduct an OTA service campaign. Remote software updates are automatically downloaded and installed in the customers vehicle free of charge and do not require a dealer visit.

Remedy Create TIPS case with fault description and videos of the flap sticking. Send the TIPS case to the Body/Chassis/Entertainment inbox.

Cause Noise in the backrest adjustment mechanism Remedy The adjustment mechanism is treated with dry lubricant spray A000 989 35 60 to rectify the noise. To do this, proceed as follows: Move the seat to the front position and put the backrest into a lying position. Due to the risk of soiling on the left and right under the adjustment mechanism, cover and protect the area. Spray into the gap of the left and right adjustment mechanism with dry lubricant spray from above. If the noise persists, then repeat the process. Enough dry lubricant spray must be used Then wait 15 minutes and leave the seat in this position! Only then adjust the seat into the sitting position. Note: Both front seats must always be treated!

Cause Noise in the backrest adjustment mechanism Remedy The adjustment mechanism is treated with dry lubricant spray A000 989 35 60 to rectify the noise. To do this, proceed as follows: Move the seat to the front position and put the backrest into a lying position. Due to the risk of soiling on the left and right under the adjustment mechanism, cover and protect the area. Spray into the gap of the left and right adjustment mechanism with dry lubricant spray from above. If the noise persists, then repeat the process. Enough dry lubricant spray must be used Then wait 15 minutes and leave the seat in this position! Only then adjust the seat into the sitting position. Note: Both front seats must always be treated!