stewarter

Hi, Guys

I'm a new one here, I was confused with my MB W211.
My E240 has a history problem of SBC(C2131), but cars still works well. so I am not going to say about SBC's problem.

Last Thursday, I drove my car to work, and it goes normally as usual, but afternoon when I try to start my car, the problem ocuured.
1. displayed the message "ESP defective, visit workshop."
2. the radiator fan runs high
3. can not start any more, when I switch the ignition on thers's no action, except radiator fan.

I've tried disconnected the bettery for about 5 mins, and it doesn't work.

Then I plug in my OBD diagnostic tool, try to read the fault code, and I got 3 more CAN problems. And I can not get into the ECM.
CAN problems includes:
1. C1514 Connection problem with ECM module at CAN. -- this from ESP
2. P2312, P2311 One or more than one messages from ECM is not on the CAN Bus(CAN Timeout) -- these from TCM
(sorry, maybe these description not correct because I translate it from chinese, but the code is right)

I've checked all the fuses, none of them are failed. and I thought does the ECM died?
then I unpluged my ECM, sent it to someone who can fix it. after that, I plug the fixed ECM back, still not work.
even I got another ECM module from another E240, and plugin, STILL NOT WORKING.
and I couldn't find any helpful Diagram of the system.

now I have no idea with this problem, could it be a short circuit from any sensor's plug? or the prolem of front SAM?