There are 4 stored owner reports matching the speed control & cruise leading-label group for the 2009 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 4 of 4 matching reports.
Open the full vehicle complaint log (all categories)THE INSTRUMENT CLUSTER ON MY MERCEDES C300 HAS DIED. THE SPEEDOMETER IS BROKEN, SO I CAN NOT TELL HOW FAST MY CAR IS GOING. I ALSO HAVE NO IDEA HOW MUCH GAS I HAVE IN THE CAR NOR OIL PRESSURE OR ENGINE TEMPERATURE OR RPMS. THIS SEEMS DANGEROUS TO ME.
TL* THE CONTACT OWNS A 2009 MERCEDES BENZ C300. THE CONTACT STATED THAT THE ENGINE RPMS INCREASED EXCESSIVELY AND THE VEHICLE SUDDENLY ACCELERATED WITHOUT WARNING AS THE CONTACT ATTEMPTED TO BRAKE. THE CONTACT MENTIONED THAT THE VEHICLE EVENTUALLY DECELERATED AND RESPONDED TO BRAKING ATTEMPTS. THE VEHICLE WAS NOT TAKEN TO A DEALER FOR DIAGNOSTIC TESTING. THE MANUFACTURER WAS NOT NOTIFIED OF THE FAILURE. THE VEHICLE WAS NOT REPAIRED. THE APPROXIMATE FAILURE AND CURRENT MILEAGE WAS 38,500.
TL* THE CONTACT OWNS A 2009 MERCEDES BENZ C300. THE CONTACT STATED THAT WHILE AT THE DEALER HE SLOWED THE VEHICLE DOWN IN ORDER TO DRIVE THROUGH AN AUTOMATIC DOOR WHEN SUDDEN ACCELERATION OCCURRED CAUSING THE CONTACT TO CRASH INTO THE DOOR. THE DRIVER AND TWO OTHER PEOPLE WERE INJURED. THEY WERE ALL TAKEN TO THE HOSPITAL WITH INJURIES TO THE THIGH, LEG, AND A BRUISED COLLAR BONE. THE VEHICLE WAS DESTROYED. THE INSURANCE COMPANY WAS NOTIFIED OF THE FAILURE. A POLICE REPORT WAS FILED. THE MANUFACTURER WAS NOTIFIED AND STATED THERE WAS NO ACCELERATION FAILURE OR ANY RELATED RECALLS. THE CONTACT STATED THE FLY BY WIRE CAUSED THE ACCELERATION. THE FAILURE MILEAGE WAS 35,660. UPDATED 02/07/13
I OWN A 2009 MERCEDES BENZ, MODEL C-300. THE ISSUE IS THE LOCATION OF THE CRUISE CONTROL ARM ON THE LEFT SIDE OF THE STEERING COLUMN. IN AMERICA CARS THE TURN SIGNAL ARM IS IN THAT SPOT ON THE TOP, IN THIS CAR IT IS ON THE TOP. SO IF YOU REACH FOR THE TURN SIGNAL ARM YOU TOUCH THE CRUISE CONTROL ARM FIRST BY MISTAKE. AS SOON AS YOU TOUCH THE CRUISE CONTROL IS ENGAGED AND STATS TAKING OVER. A VERY GRAVE SAFETY HAZARD. *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.
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.