2027 Mercedes-Benz GLE 350 4Matic TSBs

Fault codes U019F00 or U019F87 current/stored in MRG1 control unit. Cause Various causes Remedy Perform guided test for fault code U019F with XENTRY diagnosis. Verify the following connections are clean and tight. Correct any problems and retest pump actuation: 12V plug at M75/11 48V plug at M75/11 48V connector X192/4 Connections at 48V fuse box F153/2 Sockets 1,2, and 5 at connector 2 of MRG1 control unit M75/11 circuit 41 ground If actuation and above connections are OK, but resistance between M75/11 and engine block is less than 2 ohms or heat shield touching coolant pump, proceed with below steps. 1Modify engine insulation per attached instructions. 2Remove engine control module and measure continuity within control unit between connector 2 pin 1 and connector 6 pin 2. 2aIf open circuit is found, replace engine control unit (MRG1) and perform initial startup. Refer to XENTRY parts information group 54/054 item 300. 3Clear faults and verify M75/11 operating normally.

(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.

*NOTE Use of tracer DYE for leak checks is not approved. Only approved leak check procedures as per WIS are approved. Cause Possible refrigerant leak. Remedy Perform the following measures : *Important* Photo documentation requirement is no longer in effect as of 10/1/2025. Remedy 1: Replace Evaporator (Only applies to vehicles produced PRIOR to April 15, 2022 and has NOT had the evaporator replaced previously) 1. Ensure that the rest of the AC system has been thoroughly checked for leaks with forming gas as per WIS before condemning the evaporator. 2. If no other leaks are found, replace the evaporator 3. *Important* when you get the new evaporator, check the expansion valve bracket to see if there are any bends (see attachment "Bent Bracket"). a. If bent, remove the expansion valve and bracket and check for damage to the flange (see attachment "Flange Damage"). i. If damage is found, order another evaporator and claim the part under parts warranty. The warranty claim MUST include a photo of the damage found. ii. If no damage is found, flip the bracket and torque to 7Nm. Check the evaporator for proper sealing before fully installing. b. If no bends are found, the evaporator should be installed in the vehicle. Note *If the evaporator housing has been opened or the evaporator or housing has been tampered with, the claim will be debited. Remedy 2: (Applies to all vehicles produced on or AFTER April 15, 2022 up to August 1, 2025) 1. Ensure that the entire AC system has been thoroughly checked for leaks with forming gas as per WIS . 2. If no leaks were found AND the system came in with no cooling/low charge, OR the evaporator is suspected of leaking: 3. Replace ONLY the expansion valve bracket, seals, and bolts as supplied in kit A 167 832 47 00, in accordance with the procedure outlined in WIS document AR83.30P5520ME. 4. IF THE PRODUCTION DATE IS BETWEEN JUNE 1, 2023 AND JULY 1, 2024, REPLACE THE DRYER AS WELL. (NOT THE CONDENSER) 5. After, charge the system and perform a few drive cycles. 6. Recheck the vehicle for leaks. 7. If no leaks are found, the vehicle can be released. 8. If a minor leak is detected that is less than 50ppm, then perform the following steps: If a leak is detected, fill the system with forming gas Close all doors and windows for 10 minutes. Vehicle off with no blower activation. Open the driver's door and measure ppm detection as soon as the door is open and the sniffer goes into the vehicle. If no leaks are measured, fill the system and release. Remedy 3: (Only applies to vehicles produced AFTER August 1, 2025) Ensure that the entire AC system has been thoroughly checked for leaks with forming gas as per WIS . If no leaks are found or the expansion valve has been found to be leaking, remove the expansion valve and check the bracket. If the bracket is bent, replace the expansion valve bracket, seals, and bolts as supplied in kit A 167 832 47 00. In the warranty submission, include photos of both sides of the bracket and a side profile so it can be seen that the bracket is bent. If the bracket is NOT bent or leaks from other locations are found, then open a TIPS case with the following: 1. Initial Quick Test 2. Create a short video of the actual pressures via AC machine, showing the engine running, and hold a copy of the VIN/RO in view as well. 3. OBS recording of XENTRY AC actual values of compressor request to be on and current value. (Instructions in Attachments) 4. Video recording of the leak being found via sniffer at the R/F AC drain after removing the under dash panel if the evaporator is suspected. (see attached videos) 5. If the evaporator is found to be leaking via sniffer, another video needs to be uploaded (or a continuation if only making the video after checks), showing the expansion valve being checked for leaks. 6. If no leaks are found with the sniffer at the expansion valve, spray soapy water mix on the

Cause Optimized brake pads may produce some noise and is normal at low speeds and light pressure. If the noise begins when the weather is colder, brake noise during this time is normal and the below remedy will not rectify. Remedy NOTE: Exchanging brake discs for noise is not a permanent measure for noise mitigation and cannot be claimed under warranty according to this LI. If the brake pads have not been exchanged prior, vehicle is newer, and this is the first visit for brake noise: Wipe down brake disc and remove any brake dust from holes in brake disc. GLE ONLY Replace brake pads and spring clips. Ensure the double sided adhesive is applied to all locations where the pistons contact the brake pad backing plate. See attachment "Adhesive and Copper Paste Application Area Series 167". Apply Molykote to the sides of the brake pad backing plate in the location shown in the attachment "Adhesive and Copper Paste Application Area Series 167". Clean brake components thoroughly from brake dust, road debris, and other foreign material. After replacing, place the vehicle in sport or sport plus mode and engage brake pedal for 30 seconds. Bed brakes during quality checking according to LI42.10P063502 but only perform once. If the brake pads have been exchanged in a prior visit: The following portion is not warrantable, some brake noise, especially with sport brake packages, is normal. The below is intended to assist in reducing or mitigating brake noise for customer satisfaction purposes. Inspect the condition of the brake system per WIS. Some level of noise is acceptable and cannot be mitigated or removed at all times. Below is a list of items that can cause or exacerbate noises but are normal. With use there will be dirt, debris, brake dust, and other foreign contaminants. If the system is dirty, components should be thoroughly cleaned and wiped down. Inspect the condition of the brake pads and discs. Note any visual anomalies such as glazing, excess rust formation, pad imprints from long stationary times, etc... Driving styles. Does the noise only occur at very low speeds when coming to a stop such as with very light brake pressure? When coming to a stop and applying increased brake pressure, does the noise reduce or disappear? If so, this is normal operation. Brake pressure and application style (stopandgo traffic with consistent low brake pressure riding brakes where the brakes cannot cool sufficiently between applications). Ambient temperatures, especially colder ambient temperatures. Lower ambient temperatures can also introduce additional road debris, such as salt.

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.

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!

The UI continues to show the old stations artwork instead of updating to the new one. Cause When a new station change request is triggered, a temporary glitch is causing the Head Unit application to fail to overwrite the previous request. This glitch is causing the cover art mismatch in the Radio application. Remedy Please do not replace any parts. Please update the Head unit software to E505.9

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)

If after ensuring you've installed latest addons, you do not have the addon, please create an XSS case for manual installation. The fix will be incorporated into the 09/26 XENTRY release next week.

Cause Signal timing error. Remedy 167, 465: SW has been released. Update the FSAM to the latest SW version. 290, 118, 243, 247: Software is still in development. This fault code does not cause a drivability concern and will clear itself within 2 3 key cycles. The vehicle can be released back to the customer.

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.

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.