Taboo:

I recently had an ignition module on my 300CE fail. It may not be related, but I experienced several "loss of power" episodes prior to the complete failure and have not had any since. I have had ignition modules fail in other cars that were proceded by partial failures.

With respect to testing the crank sensor, I tried to check mine. I got voltage readings of .06+/- volts with the engine spinning by the starter. I was told that it should read closer to 1 volt "at engine speed". I replaced mine to no avail - it was the ignition module.

There are not many inputs to the module that cause no spark.

The good news is that the module for your car should be available and relatively inexpensive if that is what you need (mine was $2700+ from MB new, $1250 or so rebuilt, and for $975 could be rebuilt - very luckily I found a good used one for much less). If you need it,you should be able to find new, rebuilt, or have yours rebuilt or a good used one.

Cary.