Hi MikeR,

Thanks for the information. I did check the pipes and they are sealed on the pump and the two silver valves.
Unless there is another pipe I am missing...

I checked the check valve pipes too..

I will try squeezing the pipes to see if I can induce a CEL..

Black03AR, do you know the name of the RCM for the Mercedes SLK? I went to the Mercedes dealership to inquire and they said there was no such part for the 2004 SLK which is the same exact model as my 2004 Crossfire, less the body style.

Perhaps the Mercedes calls the RCM module something different? I did try to do a search online for the Mercedes RCM part.

Thanks Fellas..