Help please 1996 c220 runs rough and idles wrong

When I take off from a stop the car starts to chug and sputter until I let off the gas then it will drop a cylender and run like crap. If I turn the ignition off it will reset and run regualr. can any one tell me what may be wrong with it?

[Bazzman]

apart from a fill up with poor quality fuel, check the ignition, coil(s) leads etc. But begin with the spark plugs. And go for copper core, not platinum.

Barry
1994 E200 Wagon 115k miles