Mercedes Benz C300 owners have reported 38 problems related to crankcase (pcv) (under the engine and engine cooling category). The most recently reported issues are listed below. Also please check out the statistics and reliability analysis of Mercedes Benz C300 based on all problems reported for the C300.
My 2016 C300 4matic, which has been serviced exceptionally well, turned 57,000 miles (7k miles outside of warranty), had the check engine light turn on. I went to my mechanic, who has a state of the art diagnostic unit, and it was diagnosed as code p052e which means that the crankcase ventilation regulator valve including the fuel rail needs to be replaced. Mercedes has known about this being a major problem as they modified one of the parts. My dealership quoted me over $ 2100. 00 to fix it and deemed it not covered by the extended warranty. I have gone online to several Mercedes Benz forums and hundreds of people have had the same thing happen with this part failing around 52k mark. Since mercedes knew about this - issued an improved part to replace the defective one - NHTSA should mandate a recall. This is not some simple dyi matter. It is a complicated repair consuming many hours. It is wrong that driving this, with this code, could literally kill you. I implore NHTSA to mandate a recall based on the facts specified herein. By the way I have a 1999 ml320 that I have meticulously maintained and drives perfect and I have owned many other Mercedes Benz. I am 58 years old and I have never filed a complaint with NHTSA before. This is a very serious matter. Please help.
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all problems of the 2016 Mercedes Benz C300
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P052e pcv value problem google search results show this is a very common problem, and despite being a component of the vehicle emissions system, mercedes is refusing to repair under the emissions warranty.
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all problems of the 2015 Mercedes Benz C300
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Pcv (positive crank ventilation) error fault. Error message keeps coming and is affecting a large number of vehicles.