Mercedes Benz C300 owners have reported 431 engine and engine cooling related problems since 1996. Table 1 shows the 17 most common engine and engine cooling problems. The number one most common problem is related to the vehicle's engine and engine cooling (327 problems). The second most common problem is related to the vehicle's crankcase (pcv) (38 problems). For details of each of the problem category, use the links in the table.
Fuel lines/ clamps defective causing a fuel leak. Vehicle could catch on fire and fumes are extremely strong inside the cabin. Issue confirmed by mercedes dealer, mentioned there is an extended warranty up to 120,000 miles. Rejected mine because I was at 120,300 miles. Had to pay out of pocket. Read details...
Vehicle developed obd-ii code p052e related to crankcase ventilation/pcv system malfunction. Issue causes improper crankcase pressure, rough idle, oil vapor smells, and check engine light. Independent research shows this is a common failure on 2015–2017 mercedes C300 models. Read details...
The contact owns a 2008 mercedes-benz C300. The contact stated while driving 45 mph and depressing the accelerator pedal, the vehicle slowed down independently and lost automotive power. The contact stated that the vehicle remained in the intersection while awaiting tow services. Read details...
Check engine light appeared on dash at approximately 72k miles. Had code read and diagnosed by certified mechanic and he had an active code p06da00(this code signifies an electrical fault, open circuit, or high resistance in the circuit for the oil pump control valve on vehicles with two stage oil Read details...
This is the second timing chain timing chain tensioner that has gone bad. Even thought there have been many problems reported, mercedes will not acknowledge this as a recall problem. My safty is at risk if my engine becomes disabled on the hyway. Read details...