kid-jensen
MB Enthusiast
Still in the honeymoon period with my '07 ML320.
Being paranoid, I did a Google search for an engine description and Wikipedia came up with these worrying comments :-
"this engine (OM642) can also have an issue with the design of the positive crankcase ventilation system. The crankcase ventilation system vents to the inlet of the turbo. The issue is that the air vented from the crankcase contains too much oil to easily pass through the swirl motor valves downstream of the turbo. Once this oil and sludge begin to accumulate, the valve becomes inoperative and blows a fuse that controls many other sensors required to properly operate the engine and emission system. This will immediately place the vehicle into limp home mode and limit the rpm to 3000. It also causes a check engine light and numerous OBDII Codes. Mercedes Benz has previously recognized this feature of the vehicle and has stated that this engine feature, the accumulation of oil at the turbo inlet, is "normal".
Anyone know anything about this, and should I be worried?
My old Audi had problems blowing oil-laden crankcase fumes into the inlet so I fixed it with a catch-can. I wonder if this simple mod could be done on the ML engine?
Being paranoid, I did a Google search for an engine description and Wikipedia came up with these worrying comments :-
"this engine (OM642) can also have an issue with the design of the positive crankcase ventilation system. The crankcase ventilation system vents to the inlet of the turbo. The issue is that the air vented from the crankcase contains too much oil to easily pass through the swirl motor valves downstream of the turbo. Once this oil and sludge begin to accumulate, the valve becomes inoperative and blows a fuse that controls many other sensors required to properly operate the engine and emission system. This will immediately place the vehicle into limp home mode and limit the rpm to 3000. It also causes a check engine light and numerous OBDII Codes. Mercedes Benz has previously recognized this feature of the vehicle and has stated that this engine feature, the accumulation of oil at the turbo inlet, is "normal".
Anyone know anything about this, and should I be worried?
My old Audi had problems blowing oil-laden crankcase fumes into the inlet so I fixed it with a catch-can. I wonder if this simple mod could be done on the ML engine?
