Car Problem Reports

Mercedes-Benz ML350 Oil May Leak From PCV Vent Housings and Inspection Plates

Mercedes-Benz ML350 Problem
6 Reports
Me Too

Model Years Affected: 2003, 2004, 2005, 2007

Average Mileage: 101,117 mi (41,000 mi - 170,000 mi)


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.

  • Visitor, , 170,000 mi

    Oil leak had to replace breather part on back of head

    Flag This
  •  Rookie

    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."

    Flag This
Ask a Question