MantasP

Hello everyone , I have a bit of anomaly. I own W211 OM642 cdi , everything worked fine and all, but yesterday i got esp defective for half a second while driving , couple.miles in felt like esp is stopping me from accelerating with esp defective and radio turned off, just for a second, kept.on driving. Then it got worse , tried going up the hill, a bumpy road and my car just shut off , for a second all electronics were off , then came back up and with car off I was riding in Neutral. Start up again, came back home 5min away. Then , 200meters in I hit a small bump on the road and car shut off again. Got couple codes : CAN communication errors in Engine from ECT (no message recieved) , and in ESP disturbance of CAN in Transmission. After all that, car started up fine and all, but I was scared to drive. Came back to the trunk , checked battery , charging voltage , bought a new auxilliary battery. With radio on , I slam closed trunk / boot and now car wont start (cranking with no start, like engine ignition is down) , central locking from remote doesnt work , radio didnt work while I checked it all, cranked couple of times , IC showed Display defective. Didnt check anything else yet.
So yea , can anyone throw in a guess on what to check? Can something like battery control module do that or something else in the trunk?
Maybe someone can throw in wiring diagram of ignition system, so I can see what could be the coulprit regarding all these things stopped working?
Many thanks in advance !!!

MantasP

It was the Rear SAM.

CaliBenzDriver

what was wrong with your rear SAM, any picture of it?
Good job on finding that! I was thinking about the prefuse main-relay.
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CaliBenzDriver

what was actually wrong with your rear SAM, any picture of this beauty?
Good job on finding that!!
Personally I was thinking about the prefuse main-relay.
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MantasP

It seems my rear window wasnt sealing well, it was getting wet from above. I disassembled, cleaned all the oxidation and resoldered couple of spots. It basically was losing CAN signal intermitently. Weirdly , didnt throw a fault on it. Was kind of lucky guess, when I slammed my trunk closed and engine shut off , lol!

e55 amg2004

I had exactly the same problem today. After I closed the trunk lid the car turned off. and fuse 43 jumped out. What exactly did you do to the sam, could you please explain?