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.Google+
Car Problem Reports
Mercedes-Benz CLS500 Oil May Leak From PCV Vent Housings and Inspection Plates
Mercedes-Benz CLS500 Problem
Model Year Affected: 2006
Average Mileage: 52,031 mi (48,000 mi - 60,000 mi)
Visitor, 2006 Mercedes-Benz CLS500
My engine oil started leaking from the driver side...plus it makes my car too slow to pick up gas....im so dissappointed with mercedes cars...:( ....most of mechanics cant find the problems with my car....
Visitor, 2006 Mercedes-Benz CLS500, 52,125 mi
oil sprayed all over the engine when the abs light when on
oil leak near PS res drivers side
Oil leaking from inspection plates on the front of engine. A technician indicated that it may be a rear main seal oil leak, which seems premature for a car with only 48,000 miles. My engine light is now on, hence I will call the dealership.