By the way, when my RCM failed a couple months ago, I replaced it with the MB part and saved hundreds.

The MB dealer said these things go out all the time in both the Crossfire and the SLK because of engine heat melting the solder.

Like others, I waited about a half hour for the car to cool down and then restarted no problem.

I have the old RCM if someone want to experiment with a solution (or if you know one, I'll give it a try).

Thanks to the forum, I've saved thousands of dollars while keeping my '04 Blaze Red running in tip-top shape!