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Question Asked: Have there been any recalls reported for the 1987 Mercedes-Benz 420SEL
April 26, 2012, 10:17 PM
emissions testing
Problem Reported: Valve Stem Seals Wear and Cause Catalytic Converter Failure
May 27, 2010, 11:07 AM

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

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