Defective crackcase vent valve
2017 Mercedes-Benz GLC 300 fuel system complaints
Page 2 of 2: complaints 11 to 16 of 16, newest first, as owners wrote them.
The fuel line leaks directly under the driver seat. Filling the cabin with fuel vapors. Mercedes has an extended warranty for this problem but only on vehicles from 2004 to 2009.
P052E code, Positive Crankcase Ventilation Regulator Valve failed. It is a known issue by Mercedes Benz on its 2016 and newer C-Class and GLC class vehicles. The valve is clearly a manufacturer defect that is burdensome to the consumer as the part is located near the engine mount and prohibitively expensive to fix due to per hour labor rates. Hundreds if not thousands of consumers have been affected through no fault of their own.
While driving, the malfunction indicator lamp (mil/check engine light) came on. After some digging this was caused by an obd ii code of p052e, which indicates a blocked crankcase vent valve actuator. This appears to be a manufacturing defect in these vehicles.
Smells like gas coming through the vents into the cabin of the vehicle and causes headaches
1. Crankcase ventilation valve performance failed check engine light is on while driving 2. Smells gas from under the hood. Heard it's common problems
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