Hello !!! Got a problem with my 500 SL built in 1992. Engine runs at idle and on switching position D restless from time to time. If engine warm, partly in the lower speed range with slight acceleration uneven, as if it would not run on all cylinders. At higher speed from approx. 2000 it runs quite normal. Mercedes Benz finds nothing !!! Maybe someone can give me a tip. Greetings Jochen