There are 3 stored owner reports matching the speed control & cruise leading-label group for the 2015 Mercedes-Benz C-Class in our NHTSA-sourced dataset. These are unverified consumer reports and may not reflect confirmed defects.
This group counts stored reports whose component label starts with one of this site's matching prefixes, ignoring case. Each matching report counts once within the group. Components mentioned later in the label or only in the narrative are not searched. How component counts work
Loaded 3 of 3 matching reports.
Open the full vehicle complaint log (all categories)CAR LOOSES SPEED WHILE DRIVING IN THE STREET OR A HIGHWAY. NO CODE HAVE BEEN DETECTED IN THE COMPUTER. I HAVE BEEN TAKING THE CAR TO THE DEALERSHIP BUT THEY HAVEN'T FOUND WHAT'S THE PROBLEM.
TL* THE CONTACT OWNS A 2015 MERCEDES-BENZ C350. WHILE DRIVING 65 MPH, THE ACCELERATOR PEDAL WAS DEPRESSED, BUT THE VEHICLE FAILED TO ACCELERATE. MULTIPLE WARNING INDICATORS ILLUMINATED. AFTER THE VEHICLE WAS TURNED OFF AND RESTARTED, IT OPERATED CORRECTLY. THE VEHICLE WAS TAKEN TO FRED MARTIN OF YOUNGSTOWN (4701 MAHONING AVE, AUSTINTOWN, OH 44515, (330) 793-2444) WHERE THE CONTACT WAS UNAWARE OF THE DIAGNOSIS; HOWEVER, HE WAS INFORMED THAT SOME OF THE WIRING WAS CLEANED. THE CONTACT MENTIONED THAT THE FAILURE RECURRED A YEAR LATER AND AN APPOINTMENT WAS SCHEDULED WITH THE DEALER FOR DIAGNOSTIC TESTING. THE MANUFACTURER WAS MADE AWARE OF THE FAILURE AND INFORMED THE DEALER TO CONTACT THEM WITH THE DIAGNOSTIC RESULTS. THE APPROXIMATE FAILURE MILEAGE WAS 17,000. THE VIN WAS NOT AVAILABLE.
TL* THE CONTACT OWNS A 2015 MERCEDES BENZ C300. WHILE DRIVING AT 55 MPH, WHEN THE ACCELERATOR PEDAL WAS DEPRESSED BUT THE VEHICLE DID NOT ACCELERATE. THE CONTACT COASTED OVER TO AN EMERGENCY LANE. THE VEHICLE WAS TAKEN TO THE DEALER BUT THE FAILURE WAS UNABLE TO BE DETERMINED. THE VEHICLE WAS NOT REPAIRED. THE MANUFACTURER WAS NOT MADE AWARE OF THE FAILURE. THE FAILURE MILEAGE WAS 1,200.
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.
NHTSA source checks for this vehicle year
Checks are recorded separately for each dataset, not for the whole page. Dates use UTC. A missing check date does not mean no records exist.
Vehicle import recorded: Aug 31, 2026. This is the stored import date, not confirmation that every source was successfully refreshed.