Check Engine Light on Due to Failed Catalytic Converter on Mercedes-Benz C240

Catalytic converter failure is common and may cause a Check Engine Light to illuminate.

RepairPal Verified
Average mileage: 114,334 (47,000–144,000)
5 model years affected: 2001, 2002, 2003, 2004, more2005
14 people reported this problem
3 people shared problem details
Catalytic converter making noise and check engine light comes on. Car skips when it does so. Fixing to replace converter.
Engine light on. Computer NO OPERATING PROBLEMS. Engine occasionally shakes or is rough in operation.
p0300, p 0306, p0305 dtc's Catalytic converter rattled under load
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