Need a little help.

Need help how do i connect to the bcm back window dont work

 

That is a long list of faults with little context. I assume far more than your rear windows are not working. A quick glance seems to say that your ECU has lost communication with CAN-B (body).

Can you communicate with your ECU? Where did you get these codes from & what led up to this situation?

I reach out in hope also that someone more knowledgeable than me joins us. But either way, more context is better.

 

Yes I can connect to the ecu. It's from an odb scanner just brought car. It's came like that it's always had those codes. It won't let me erase them

 

With those codes present the only issue is the rear window doesnt work?

Im searching for the meaning of those codes and coming across larger issues than just a window not working.

 

Tcm or transmission. Jurks when switching to 2 gear i believe the powersteering pump or both

 

Been a while....any progress hopefully? How about the basic 1st steps like battery/alt health, voltages at fuses, supply voltages to control modules, etc?

I'm going through my own electrical bs myself. I'd personally rather rebuild 1 engine a wk for the rest of my life than deal with this illogical nonsense, but here we are.

At the very least, you need a capable Benz specific scan tool such as the Launch Creader Elite, iCarsoft MB V3, etc. Any associated live data you can monitor that aligns with your symptoms will at least get you started. Collect as many "knowns" as you can (I know this module is getting 12.5v but this other is only getting 10v, etc.). Check all chassis grounds, ensure there's no water ingress, check electrical connectors for anything obvious. W203's have a still unresolved recall for the sunroof seal (at least I believe it's still unresolved. My sister still has heard nothing.) Water at CAN wiring junctions at front driver & passenger carpets is fairly common from clogged sunroof drains or windshield cowls.

You may have already pursued some of these, but this is the time for starting simple & answering as many questions as you can to have you troubleshooting continue to become more of a narrowed focus. Right now it's pretty broad. Good luck man.