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What 66 owners told NHTSA about the 2018 Mercedes-benz E-class

These are the actual owner complaints behind this car’s reliability verdict, filed with the federal government, unedited. They’re unverified reports, not confirmed defects: read them as leads for your pre-purchase inspection, not a diagnosis.

All (66)Crash / fire / injury (7)Electrical system (13)Engine (13)Wheels (8)Steering (7)Transmission & drivetrain (6)Driver assistance (5)Body & structure (4)Brakes (4)Seat belts (4)Speed control (4)

4 of 66 complaints match · Seat belts · clear filters

Feb 3, 2026Seat belts

The driver-side seat belt retractor on my 2018 Mercedes-Benz E400 (W213) has failed to fully retract, leaving significant slack across the driver's chest and lap. An authorized Mercedes-Benz dealer has diagnosed the issue as a failed seat belt motor. This component is part of the vehicle's electronic PRE-SAFE system. Because the belt no longer retracts into its stowed position or maintains tension, the vehicle is in a state of non-compliance with Federal Motor Vehicle Safety Standard (FMVSS) No. 209 (Seat Belt Assemblies). Specifically, it fails to meet the retraction requirements necessary to ensure the webbing properly locates on the occupant's body. Furthermore, the failure of the motor disables the PRE-SAFE tensioning function, which is a critical safety system. Despite being a safety component and the vehicle being less than 10 years old, the manufacturer has refused to remedy this safety defect under the National Traffic and Motor Vehicle Safety Act. A non-retracting seat belt is an unreasonable risk to safety as it increases the probability of injury or ejection during a crash.

NHTSA ODI 11715242

Jan 12, 2025Seat belts

Passenger seatbelt does not latch to the buckle. Therefore I am unable to have passengers in my vehicle. And when I do it becomes a huge safety issue. No mechanic can seem to figure out what is wrong with it.

NHTSA ODI 11635486

Jan 31, 2024Seat belts

The seat belts do not retract when taking them off.

NHTSA ODI 11569129

Mar 29, 2021Seat belts

FRONT SEATBELTS DON'T RETRACT.

NHTSA ODI 11405488

Working with the data? Download all 66 complaints as CSV · fetched from NHTSA July 14, 2026

How to use these: a complaint is one owner’s report, filed voluntarily and published unverified. Patterns matter more than any single story. If several owners describe the same failure at similar mileage, put that system at the top of your pre-purchase inspection list. Back to the full 2018 Mercedes-benz E-class verdict →