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Mercedes-Benz S420 Catalytic Converter Replacement Cost

The average cost for a Mercedes-Benz S420 Catalytic Converter Replacement is between $1851 and $2536. Labor costs are estimated between $237 and $300 while parts are priced between $1614 and $2236. Estimate does not include taxes and fees.
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How Much Does a Catalytic Converter Replacement Cost?

Catalytic Converter Replacement Service and Cost

Common Symptoms

A failing catalytic converter can cause a Mercedes-Benz S420 to fail emissions tests and the Check Engine Light to illuminate. The exhaust might have an unusual smell.

A "restricted" catalytic converter can result in a loss of engine power.

Best Practices

Catalytic converters are vehicle-specific parts. We recommend using a high quality new part, which is required by emissions control programs in many states.

Common Misdiagnoses

It is very important to have the shop identify why the catalytic converter failed. Failure is almost always due to another problem, which if not resolved, will quickly ruin a new catalytic converter.

Most Common Mercedes-Benz S420 Repairs

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