Engine Oil Leak From PCV Vent Housing and/or Engine Inspection Plate on Mercedes-Benz GL450

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: 74,195 (12,500–163,000)
5 model years affected: 2007, 2008, 2009, 2010, more2012
18 people reported this problem
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problem details
2008 Mercedes-Benz GL450 39,555 mi,
oil leak from the top of the engine valve cover, dripping down to my garage ground.got fixed from the dealer
2008 Mercedes-Benz GL450 163,000 mi,
Problem just started with 163,000 miles. Oil drips onto manifold and smokes coming into the garage.
2008 Mercedes-Benz GL450 107,000 mi,
Was told of the oil leak behind the engine during a regular service repair/inspection.
2008 Mercedes-Benz GL450 61,000 mi,
leak from PCV causing smell of smoke
oil leak , wet hoses, going to bring back to dealer under warranty.