This may sound like an stupid comment but I didn't know it until someone explained it to me on this forum.

When you changed your spark plugs did you use the standard copper bosch plugs? I've heard platinum or anything but stock will wreak havoc on MB's. Just a thought.

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Afshin

Current:
02 C32 AMG

Previous:
92 500E
84 190E 2.3 5 Spd