Catalytic Converter Failure Due to Engine Burning Oil on Mercedes-Benz 420SEL

Valve stem seals may wear and cause the engine to burn oil. this can contaminate the catalytic converter and cause it to fail.

RepairPal Verified
Average mileage: (–)
2 model years affected: 1990, 1991
3 people reported this problem
Viewing
1
-
1
of
1
problem details