Car is a 1991 500SL. Engine has no spark. The ignition switch has been changed as well as one crank position sensor. There is voltage going to the coils but no spark.
The owner removed the ICU and replaced it with a used one. Apparently the engine ran for 1/2 hour but would not restart after shut down. Looks like the same problem as before.
The ICU is very exspensive and can't be sent back once you install it. Anyone have any ideas other than this part?