Three problems related to power train have been reported for the 2012 Mercedes Benz C300. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2012 Mercedes Benz C300 based on all problems reported for the 2012 C300.
Vehicle sub-frame is cracked rusted corroded.
The left rear weld of the subframe on my 2012 C300 4matic has rotted through and appears to be a manufacture's part defect. I found out about this issue from a brake inspection and told it is a safety concern, which Mercedes Benzes is aware of but has no recalls for the defect.
The contact owns a 2012 Mercedes Benz C300. The contact stated that when the vehicle was started and the accelerator pedal was depressed, the vehicle stalled without warning. The contact mentioned that the failure occurred periodically. The vehicle was taking to an independent mechanic where the failure could not be determined. Mercedes-benz of alexandria (200 s pickett st, alexandria, va 22304 (703) 341-2100) and mercedes-benz of annapolis (324 6th st, annapolis, MD 21403 (888) 261-7620) were contacted and informed the contact to bring the vehicle in for a diagnostic test. The vehicle was not taken to a dealer for a diagnostic test or repairs. The manufacturer was not made aware of the failure. The failure mileage was 135,000.
| Power Train problems | |
| Transmission Noise problems |