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#BS-2020-MERS45-19CD2020 Mercedes-Benz S 450Problems, Recalls & Reliability
Based on reports from 4 owners and 4 recalls for this exact model.
Data updated ·NHTSA complaints through October 8, 2026
Preliminary Verdict
Green Light
Based on 4 complaints, 0 crashes, 0 fires, and 4 recalls.
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Mechanic Inspection Checklist
1 owners reported fuel system issues — failures commonly reported around 2K miles.
30,000-Mile Cost Projection
Best Case
Most Likely
Worst Case
Top cost driver: Fuel System (1 reports).
Also in your report
Owner Intelligence
AI-synthesized themes from real complaints
Buyer Lot Checklist
Questions, test drive checks, walk-away triggers
Negotiation Talking Points
Data-backed dollar deductions
Buy / Skip Verdict
Final recommendation with conditions
Where the complaints fall
2020 Mercedes-Benz S 450: Known Issues & Problem Areas
Fuel System Issues
Fuel System complaints account for 25% of all reports filed for the 2020 Mercedes-Benz S 450, with 1 owners filing complaints with NHTSA. The median mileage at time of complaint is 1,700 miles, suggesting issues tend to surface around the 2K-mile mark.
Speed Control Issues
Speed Control complaints account for 25% of all reports filed for the 2020 Mercedes-Benz S 450, with 1 owners filing complaints with NHTSA. Owners should pay attention to speed control-related symptoms during test drives and pre-purchase inspections.
Visibility Issues
Visibility complaints account for 25% of all reports filed for the 2020 Mercedes-Benz S 450, with 1 owners filing complaints with NHTSA. Owners should pay attention to visibility-related symptoms during test drives and pre-purchase inspections.
Data sourced from NHTSA owner complaints and community reports. The full report analyzes severity, repair costs, and failure patterns for each category.
Complaint trend by year
Complaints filed with NHTSA by year for the 2020 Mercedes-Benz S 450. Recent trend: stable.
Don't negotiate blind — know what this car costs to own
Repair costs • Negotiation scripts • Mechanic checklist • Buy/skip verdict
Recall History (4 recalls)
COMMUNICATION: AUTO CRASH NOTIFICATION
Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2016 - 2021 CLA-Class, GLA-Class, GLE-Class, GLS-Class, SLC-Class, A-Class, GT-Class, C-Class, E-Class, S-Class, CLS-Class, SL-Class, B-Class, GLB-Class, GLC-Class, and G-Class vehicles. Please refer to the Part 573 report for specific vehicle model details. The software design of the communication module may fail to communicate the correct vehicle location for the emergency call system (eCall) in the event of a crash.
STRUCTURE:BODY:ROOF AND PILLARS
Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2017-2020 C300 Coupe, C43 Coupe AMG, C43 AMG, 2015-2020 C300, GLA250, 2016-2018 C350e, CLA45 Coupe AMG, 2015 C400, S65 AMG, 2015-2019 C63 AMG, 2016 C450, 2015-2016 GLA45 AMG, S600, 2016-2020 GLC300, 2017-2019 GLC43 AMG, GLE43 Coupe AMG, 2014-2019 CLA250 Coupe, 2014-2015 CLA45 AMG, 2018 GLC63 AMG, 2014-2017 S550, 2018-2020 S450, 2016-2019 GLE63 Coupe AMG, 2016 GLE450 Coupe, 2014-2020 S63 AMG, 2018-2019 S560, and 2019 GLC350e vehicles equipped with a panoramic sunroof. The front roof panel located between the windshield and the panoramic sunroof may not have been bonded correctly to the vehicle during a prior repair.
AIR BAGS:SENSOR:SIDE IMPACT
Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2021 CLS450, AMG E53, AMG CLS53, E350, E450, AMG GT43, AMG GT53, 2020 S450, S560, G550, AMG GLC63, 2020-2021 GLC300, and AMG G63 vehicles. The side crash sensor connectors may come loose, which could delay the activation of air bags and seatbelts during a side impact crash.
COMMUNICATION: AUTO CRASH NOTIFICATION
Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2017-2022 CLA-Class, GLA-Class, GLE-Class, GLS-Class, SLC-Class, A-Class, AMG GT-Class, C-Class, E-Class, S-Class, SL-Class, GLC-Class, CLS-Class, GLB-Class, and G-Class vehicles. Please refer to MBUSA's recall report for specific vehicle model details. An error in the communication module's SIM card software can cause a mobile network connection failure, disabling the emergency call (eCall) system.
Recall severity analysis & seller scripts
The full report rates each recall's severity and gives you scripts for asking the seller about recall completion.
NHTSA Defect Investigations (1)
All closed. Investigations are how NHTSA decides whether a defect needs a recall.
Front Roof Panel Detachment
STRUCTURE:BODY:ROOF AND PILLARS
The worst model year for the Mercedes-Benz S 450 is the 2018 — worth knowing if you're cross-shopping years. The biggest problem area is electrical.
About this data
NHTSA Complaints
Federal database of owner-filed safety complaints. 4 records for this vehicle.
NHTSA Recalls
Manufacturer-issued safety recalls. 4 recalls found for this vehicle.
Repair Cost Data
Real-world repair costs from owner reports and independent databases.
Last updated . NHTSA complaints received through October 8, 2026.
2020 Mercedes-Benz S 450: Frequently Asked Questions
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Get the Full 2020 Mercedes-Benz S 450 Report
10 sections of AI analysis based on 4 owner reports. Know before you buy.