Rough Idle
 

I have a 2004, C230 Sport sedan, 6-speed manual, with about 65,000 on it. I drove it about 100 miles and then parked it for three days. When I started it up, the idle is very rough and the engine wants to stall. At speed, it runs fine. However, as soon as the throttle closes, you feel the engine speed drop dramatically as if the engine were shut off. Otherwise, the car performs beautifully. What do you think? New fuel filter? Clean the throttle body? By the way, the check engine light came on but there are no malfunctions shown on the computer.

There is a service campaign for defective crankcase breather hoses, vacuum leaks...

Also that engine has had valve sealing issues, check compression??

Rough Idle
 

Thanks, MB Doc. I will check the compression and look over the hoses. I assume I can get the campaign details from StarTek Info?

Sure or I can e-mail that SC.

Rough Idle
 

MB Doc,
Please e-mail the SC. I went to StarTek Info and only found a service campaign for the 2007 year and it was for the electronic engine control unit. Thanks for your help.

Send me an e-mail. so I can reply