the car run great, but at idel run rough. nor sure if filter
air or fuel. 80k miles. engine check light on dash
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2003 Mercedes-Benz C240 Question: rough idel
Answer #1dandd December 02, 2010, 21:48Master
Need to get those Check Engine Light Codes, that will REALLY help you to solve the rough idle, which sounds like it could be a misfire problem. Does the Check Engine Light ever blink, because that is indicates a severe misfire problem that is ruining your Catalytic Converters, which on a Mercedes is very $$ expensive.