I have been fighting this problem for 2.5 years. We have tried numerous control units, Throttle actuators, wheel sensors, the little microswitch on the gas pedal and every other thing that has been suggested. The car runs beautifully after a couple of restarts in the first 1/4 mile. I've had retired Mercedes mechanics look at it and come away stumped. I've tried everything that mbdoc has suggested. We have new tires, battery, alternator, etc. Monitored the voltage while driving and start up, everything OK. Have a good harness and wiring to the ETA. Frankly, don't know where to go next!!
Anziani
'93 320CE 208K
'95 E420 129K