I also have a M103 stalling problem which occurs only when I let the car sit for more than two days. If driven daily it never fails to serve. Usually after sitting for 2+ days it starts fine then after about 10 minutes of driving it will start to hesistate if trying to accelerate or hold speed on a hill, if keeping at speed it will continue to run but then when I have to slow down to a stoplight and idle it will quit. I then can't get it to start again. Last Tuesday on the way to work I tried to start it for an hour as I was stuck in an off ramp, to the point where the battery died. The engine felt like it was misfiring on cylinders so I figure this could be related to the flywheel sensor at least. So anyways I had it towed home, after work it started like there wasn't a problem. I have replaced the EHA and idle switch and this happened before and afterwards and the front hall sensor (not connected for timing equipment only) won't fix it. Last month it quit on a parking lot after sitting for four days and in about 15 minutes of waiting it started again, but not easily. I'm still stumped. Anyone try replacing the flywheel sensor or coil or ignition module?
Thanks,
Ian
1990 300TE 4MATIC