Engine Oil Leak From PCV Vent Housing and/or Engine Inspection Plate on Mercedes-Benz ML350

An engine Oil leak may develop from the PCV vent housing on the valve cover and/or the inspection plate on the front of the engine.

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Average mileage: 101,117 (41,000–170,000)
4 model years affected: 2003, 2004, 2005, 2007
6 people reported this problem
2 people shared problem details
Oil leak had to replace breather part on back of head
Mine was described as "valve cover breather" both right and left leak oil. Didn't trust the dealership, Barrier (after ongoing failed steering fluid leak repairs) so I went to their ex-employees at Mercedes Garage. They replaces L&R valve cover gaskets, rebuilt upper chambers, replaced breather hoses."
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