2021 Mercedes-Benz C-Class FUEL/PROPULSION SYSTEM
Owner-reported problems and safety issues filed with NHTSA. Review common failures, severity levels, and complaint trends over time.
Complaint Timeline
Chronological view of owner reports
My car had a coolant leak last year a hose broke and I have a 2021. My son’s mercedes sis the same thing on 11/23/2025. I have researched ma y others with this same issue. There should be a recall on that hose or whatever the problem Is.
While driving car on Sunday 10/5, it suddenly failed to respond to gas pedal pressure. The car stopped accelerating and rather slowed to 15 MPH, almost causing a car from behind to hit me in the rear side.
Trend Over Time
Complaints by year
Other Issues
Common problems reported
Quick Summary
The 2021 Mercedes-Benz C-Class has 2 FUEL/PROPULSION SYSTEM complaints on file. Review the timeline above for detailed owner experiences.