Originally Posted by
abcdcohen
He said there was a problem communicating with the transmission and that it wasn't related to the RCM.
Wrong, it might not be the RCM, but if the RCM is not powering everything up, you can't communicate between modules.
He suggested taking the car to the dealer.
Yea, do that. Take the car to a Chrysler dealer, they likely know little more about the car than he does. Make sure you leave a blank check with them.
Put key in, turn to start, if it won't start, release key. Wait 45 seconds, does engine fan start running fast and loud? If so, Id order a new RCM. DO NOT search "Chrysler Crossfire", search "2003 Mercedes SLK320 Relay Control Module" (or SLK230).