Bcm help
Member
Joined: Nov 2024
Posts: 152
Likes: 43
From: New Jersey/Philly
2010 E350 Coupe
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.
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.
MBWorld Fanatic!
Joined: Aug 2023
Posts: 3,600
Likes: 1,071
From: MA Coast
W204 2010 C300 4matic Sport M272
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.
Im searching for the meaning of those codes and coming across larger issues than just a window not working.
Member
Joined: Nov 2024
Posts: 152
Likes: 43
From: New Jersey/Philly
2010 E350 Coupe
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.
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.
