Three problems related to vehicle speed control have been reported for the 2009 Mercedes Benz C300. The most recently reported issues are listed below.
My car every so often won't start battery is good starter is good just does nothing happened over 10x had it towed to 5 mechanics shops and mercedes can't diagnose problem because after a a day maybe two sometimes 4 or 5 the car will just start up on its own and then a few weeks or months we go through it all over again researched and other mercedes C300 drivers have the same problem for months and its the steering lock module.
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.
I was driving on the parkway at ~40 mph and attempted to slow down by stepping on the brake. The car did not slow down but accelerated. And struck the car in front of me. Every time I pressed on the brake, the car accelerated so that the car struck the car in front twice. I tried to turn off the ignition and was unable to. Finally, I pushed hard on the brake enough to slow it down and I was ten able to put the car in neutral. The engine raced but I was then able to turn it off. Despite damage to the front of the vehicle, the airbags did not deploy.
| Car Accelerates On Its Own problems | |
| Vehicle Speed Control problems | |
| Speed Sensor problems | |
| Cruise Control problems |