2014 c300 sport - loud squealing noise - Mercedes-Benz Forum
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post #1 of 1 (permalink) Old 06-06-2019, 11:08 AM Thread Starter
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Date registered: Jun 2019
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2014 c300 sport - loud squealing noise

Hi - first post here. I have a 2014 c300 and it is throwing a P0507 and 2 P2279 fault codes. When warmed up the engine emits a loud squealing noise. On acceleration, the noise seems to decrease. It is loudest at idle. When I remove the oil fill cap, there is a lot of suction and the noise stops. I tried removing the air filter and notice some oil at the bottom. I can't seem to figure out if this engine has a centrifuge. I can't seem to find out much on line. There seems to be a lot more info for the w203?
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