I have a 2009 CL550. Car was working fine the other day. I went to start it and nothing. No click or crank. It give me a message of keep in gear and drive to workshop. I connected my autel scanner and it's telling me the CAN bus is off and there's a short circuit to the powertrain. My scanner is also saying that it can't communicate with the transmission control module or the intelligent servo control. I've checked the fuses for those 2 and they are fine. Any ideas? I can't even shift the car into neutral to move the car. Is my TCM dead?

 

You need a much better scan. Find someone with DAS Xentry

 

Hi did you sort it in the end? I have exactly the same problem? Cheers

 

I no longer have the car but yes I did figure it out. It was a small white rectangular module (maybe 1.5” x 3” in dimensions) under the driver seat. Mounted on the vent ducts. It’s the CAN bridge. I believe it allows all the can modules to talk to each other. Mine was corroded or water damaged. The dealer figured it out. Car worked fine after replacement. Part was inexpensive even for the dealer.

 

Thank mate, i have one and will try tomorrow.