I have engine? issues with my w202 99 c230k. If I step on the accel. more than about half way, the car goes into convulsions! Even worse when it is cold. Then sometimes I think it kicks into limp-home mode. I stop the car, restart it and it goes back to normal, as long as I don't step on too hard! I've had it scanned, and it seems to be missfiring. The mechanic did not know for sure from the scan, but was guessing on a few things. Before I let him guess with my pocketbook, I figured that I would check here to see if anyone has had similar problems, and what the solution was. I changed plugs, wires, coil packs. Did not help...
Any takers on this one??? (oh yeah, 141,000 km or approx 87,000 miles)

Dale