Check Engine Light on Due to Failed Catalytic Converter on Mercedes-Benz C240 4MATIC

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

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Average mileage: 46,666 (25,000–61,000)
3 model years affected: 2003, 2004, 2005
9 people reported this problem
3 people shared problem details
Catalytic converter went out at 22000 miles. Sounded like BBs rolling around under the car.
just fixed it and luckily it is still within warranty.
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