2020 Mercedes-Benz C-Class problems and complaints
Owners have filed 47 complaints with NHTSA about the 2020 Mercedes-Benz C-Class. The most-reported areas: Engine (9), Power Train (8), Unknown Or Other (7).
Key takeaways
- 47 owner complaints on file with NHTSA.
- 5 involve a crash, 0 a fire, 5 reported injuries.
- Complaints are unverified owner reports; recalls are confirmed defects.
| Component | Complaints | Share |
|---|---|---|
| Engine | 9 | 19% |
| Power Train | 8 | 17% |
| Unknown Or Other | 7 | 15% |
| Structure | 5 | 11% |
| Electrical System | 4 | 9% |
| Fuel/Propulsion System | 4 | 9% |
| Back Over Prevention | 4 | 9% |
| Air Bags | 3 | 6% |
| Forward Collision Avoidance | 3 | 6% |
| Steering | 3 | 6% |
| Visibility | 3 | 6% |
| Service Brakes | 2 | 4% |
One complaint can name several components, so shares add up to more than 100%.
Parts for the 2020 Mercedes-Benz C-Class
GarageDex's verified specs for this car. Each Buy button searches Amazon for that exact part.
- Battery
- Engine oil
- Cabin air filter
- Wiper blades
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| Version | Overall | Front | Side | Rollover |
|---|---|---|---|---|
| 2020 Mercedes-Benz C-Class 2 DR 4WD | Not rated | Not rated | Not rated | Not rated |
| 2020 Mercedes-Benz C-Class 4 DR 4WD | Not rated | 4/5 | Not rated | 4/5 |
| 2020 Mercedes-Benz C-Class 2 DR RWD | Not rated | Not rated | Not rated | Not rated |
| 2020 Mercedes-Benz C-Class 4 DR RWD | Not rated | 4/5 | Not rated | 4/5 |
Latest complaints, as filed
Owner-written and unverified by NHTSA.
Service Brakes, Hydraulic,power Train - filed 2026-11-03
The contact owns a 2020 Mercedes-Benz C-300. The contact stated that while driving at an undisclosed speed, the brake pedal was depressed, and the brake pedal was abnormally difficult to depress. In addition, the contact became aware of an abnormal sound coming from the footwell. The dealer was contacted and made aware...
Structure - filed 2026-08-02
I own a 2020 Mercedes-Benz C300 equipped with a power trunk. On July 22, 2026, I took my vehicle to Annapolis Mercedes-Benz because the power trunk was repeatedly closing on its own while people were standing in the trunk opening. I specifically reported that the trunk was unexpectedly closing while I, my child, or ano...
Structure - filed 2026-07-01
Automatic trunk closing mechanism caused the trunk hood to close on my head as I was putting groceries in the trunk. This has occurred several times in the past but this time it hit my head with more force. I have not brought it to a dealer and it has not been inspected by the manufacturer, police or any other entity...
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More for the 2020 Mercedes-Benz C-Class
Complaints are reports filed by owners with the National Highway Traffic Safety Administration. NHTSA publishes them without verifying them, and counts rise with how many cars were sold, so compare years of the same model rather than different models. Crash ratings are NHTSA's own 5-Star Safety Ratings results.