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2012 c350 coupe 4matic, 1994 Toyota Supra twin turbo
w204 C350 - Oil Found In Intake System
Vehicle is a '12 C350 coupe. This morning I figured I check to see how dirty my air filter is. Upon opening up the intake box, I saw one corner of the air filter stained with oil. I took out the filter and took a look inside the intake box and found a small puddle of oil. I then decided to take out all the pieces from the intake box to the throttle body and clean them thoroughly.
My question is this a common issue? I did some research and all I found is that there can be some traces of oil that may travel up the PCV from the crankcase. Is this true? Is it possible to cap off the breather tube that leads to the intake pipe?