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: 103,267 (47,000–130,000)
5 model years affected: 2001, 2002, 2003, 2004, more2005
12 people reported this problem
1 person shared problem details
p0300, p 0306, p0305 dtc's Catalytic converter rattled under load
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