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What 233 owners told NHTSA about the 2012 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 (233)Crash / fire / injury (9)Airbags (92)Fuel system (37)Electrical system (22)Brakes (21)Engine (20)Suspension (15)Steering (12)Transmission & drivetrain (10)Body & structure (8)Seats (7)

1 of 233 complaints match · Brakes · crash/fire/injury only · clear filters

Dec 5, 2024BrakesCrash1 injury

The contact owned a 2012 Mercedes-Benz E550. The contact stated while her husband was driving 20-25 MPH and making a right turn, the brake pedal was depressed but traveled down to the floorboard, and the vehicle failed to respond. The contact's husband stood on the brake pedal; however, the vehicle failed to respond and crashed into a small ditch. The contact was occupying the front passenger's side seat at the time of the incident. The contact was unsure whether there was a warning light illuminated. The air bags deployed. The contact stated that there was smoke coming from the air bags. Both the contact and her husband immediately exited the vehicle. The contact's husband did not sustain any injuries. The contact stated that her left arm was deformed. The contact was transported to the Hospital by a family member. The Doctor diagnosed that the contact had sustained two broken bones on the left arm and two broken bones on the left foot. The contact underwent surgery and was scheduled for physical therapy. The contact was unsure whether a police report was filed. The vehicle was towed and totaled by the insurance company. The dealer was not notified of the failure. The manufacturer was notified of the failure and advised the contact that a field inspector would be sent to inspect the vehicle. The failure mileage was unknown.

NHTSA ODI 11629095

Working with the data? Download all 233 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 2012 Mercedes-benz E-class verdict →