One problem related to starter has been reported for the 2009 Mercedes Benz C300. The most recently reported issues are listed below.
The car was running fine. It was parked and shut off. When I returned, the car would not start. It was not the battery. The steering would not unlock. The car had to be towed in for repair. The dealer had to make the repair as it was an issue with either the eis or a starter issue. Inskip mercedes can identify exactly what was wrong as they did the repair.