There are 6 owner-reported engine complaints for the 2010 Mercedes-Benz C-Classin NHTSA's database. These are unverified consumer reports and may not reflect confirmed defects.
TL* THE CONTACT OWNS A 2010 MERCEDES-BENZ C300. WHILE DRIVING, THE ENGINE WARNING INDICATOR ILLUMINATED AND A FUEL ODOR ENTERED THE VEHICLE. THE VEHICLE WAS TAKEN TO MERCEDES-BENZ OF SOUTH MISSISSIPPI (11619 BOBBY ELEUTERIUS BLVD, D'IBERVILLE, MS 39540), BUT THE FAILURE COULD NOT BE DUPLICATED. DAYS LATER, THE FAILURE PERSISTED. THE VEHICLE WAS TAKEN BACK TO MERCEDES-BENZ OF SOUTH MISSISSIPPI, BUT THE CAUSE OF THE FAILURE COULD NOT BE DIAGNOSED. THE VEHICLE WAS NOT REPAIRED. THE VEHICLE WAS TAKEN TO AN INDEPENDENT MECHANIC WHERE THEY INFORMED THE CONTACT THAT THERE WAS LIQUID GAS FORMED ON TOP OF THE FUEL PUMP AND A SEAL NEEDED TO BE REPLACED. THE VEHICLE WAS NOT REPAIRED. THE MANUFACTURER WAS NOTIFIED OF THE FAILURE. THE APPROXIMATE FAILURE MILEAGE WAS 70,000.
I WAS TOLD THAT MY CAR HAS A RECALL FOR THE CAMSHAFT ADJUSTMENT SOLENOID. I TOOK MY CAR INTO MERCEDES TO BE REPAIRED AND THEY TOLD ME THAT THE RECALL WAS CLOSED AND THEY COULD NOT REPAIR MY VEHICLE. I AM WORRIED ABOUT THIS ISSUE CAUSING MORE DAMAGE TO MY ENGINE AND I AM CONCERNED FOR MY SAFETY WHILE OPERATING MY VEHICLE. I ENCOUNTER PROBLEMS WITH MY VEHICLE WHILE DRIVING.
LUCKILY I TOOK CAR IN FOR A SAFETY CHECK AND BELT TENSIONER WAS FOUND TO BE SHREDDING. IT SHOULD LAST LONGER THAN THIS AND IS A SAFETY HAZARD. THIS EXTRA VISIT TO THE DEALER MAY HAVE SAVE ME FROM HAVING AN INCIDENT. I OTHERWISE NEVER WOULD'VE KNOW THE BELT WAS SHREDDING. *TR
I WAS DRIVING THE CAR AND JUST STOP IN THE MIDDLE OF THE STREET, I ALMOST HAD AND ACCIDENT. I TOOK MY CAR TO MY MECHANIC, HE CAN'T FIXED, THE DEALER NEED TO DO THE JOB FOR TREE TIMES MORE. THAN MY MECHANIC. THIS IS UNFAIR! I BUY MY CAR IN 2012 ORIGINAL MILEAGE 10000MILES. TO MY KNOWLEDGE IS TO LOW VERY MILEAGE FOR HAVING THIS TYPE A PROBLEM. *TR
BELT TENSIONER IS FAILING WHICH IS CAUSING DAMAGE TO THE SERPENTINE BELT. *TR
THE BELT TENSIONER FOR THE SERPENTINE BELT SEIZED UP CAUSING THE SERPENTINE BELT TO SHRED AND CAUSING DAMAGE TO THE UPPER AND LOWER PULLEYS. THE CAR BECAME IMMOBILE IMMEDIATELY AS ALL THE ACCESSORIES WERE RENDERED USELESS, LIKE THE POWER STEERING, ALTERNATOR, ETC. AS A RESULT, THE FOLLOWING HAD TO REPLACED: SERPENTINE BELT, TENSIONER, UPPER PULLEY, AND LOWER PULLEY. I WAS VERY FORTUNATE THAT THIS OCCURRED WHEN I WAS PARKING IN A PARKING LOT AFTER DRIVING ON THE HIGHWAY. IF THIS HAD HAPPENED AT HIGHWAY SPEEDS, THERE IS NO DOUBT IN MY MIND THAT IT WOULD HAVE CAUSED A VERY SERIOUS ACCIDENT, AS YOU WOULD HAVE NO STEERING ON THE HIGHWAY. WHILE RESEARCHING THIS SAFETY CONCERN ONLINE, IT SEEMS LIKE THIS IS A RELATIVELY COMMON ISSUE WITH 2008-2011 C-CLASS VEHICLES. SOME WERE REPORTED TO BE REPAIRED UNDER WARRANT WHILE MOST OTHERS HAD TO PAY FOR THE REPAIR COSTS OUT OF POCKET. THIS IS A VERY SERIOUS SAFETY CONCERN THAT CAN POSSIBLY LEAD INJURY OR DEATH. I SPOKE WITH MERCEDES BENZ CORPORATE REGARDING THIS ISSUE AND WAS TOLD THAT IT IS NOT AN ISSUE AND THERE IS NOTHING THEY WILL DO ABOUT IT. I EMPHASIZED HOW DANGEROUS THIS CAN BE AT HIGHWAY SPEEDS AND THEY DID NOT SEEM TO BE CONCERNED. MY RECOMMENDATION TO MERCEDES BENZ IS TO RECALL THE 2008-2011 C-CLASS FOR THIS ISSUE BEFORE IT CAUSES A SERIOUS INJURY OR DEATH. *TR
Complaints are unverified consumer reports submitted to NHTSA. A high complaint count may reflect vehicle popularity, not defect severity. Data sourced from NHTSA public records.
Data synced from NHTSA on Apr 25, 2026