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.
Car Problem Reports
Mercedes-Benz ML430 Oil May Leak From PCV Vent Housings and Inspection Plates
Mercedes-Benz ML430 Problem
Average Mileage: 133,500 mi (100,000 mi - 167,000 mi)
Visitor, 2000 Mercedes-Benz ML430, 167,000 mi
oil leak from pvc andb other areas 3 differeantb leaks