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What 45 owners told NHTSA about the 2020 Mercedes-benz C-class Cabriolet

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 (45)Crash / fire / injury (6)Engine (9)Transmission & drivetrain (7)Backup camera & sensors (4)Body & structure (4)Electrical system (4)Fuel system (4)Airbags (3)Driver assistance (3)Steering (3)Visibility & wipers (3)

1 of 45 complaints match · Electrical system · crash/fire/injury only · clear filters

May 25, 2021Electrical systemCrash

The contact owns a 2020 Mercedes-Benz C300. The contact stated that her son was driving at an undisclosed speed when another vehicle's muffler detached and crashed into the undercarriage of the contact's vehicle. The front driver and passenger side tires exploded and fractured the rims. The contact stated that the vehicle's alert system failed to warn her son of the incoming object which resulted in the collision. The contact's son did not receive medical attention. A police report was filed. The vehicle was towed to the dealer and repaired. The manufacturer was made aware of the failure but provided no assistance. The failure mileage was 6,000.

NHTSA ODI 11418528

Working with the data? Download all 45 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 2020 Mercedes-benz C-class Cabriolet verdict →