rough idel on 2003 Mercedes-Benz C240

the car run great, but at idel run rough. nor sure if filter
air or fuel. 80k miles. engine check light on dash

1 answer
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.