W211 E320 Radio & Heating Module Dead

[maxiv]

Hi Colleagues,

Happy New Year!

I have a 2003 E320 that worked with no issues until my friend connected the battery the other way around. Since then, the radio and the heating module inside the car have been dead. I have replaced the rear SAM module, but it didn't fix the issue. I have removed the radio and checked the power supply behind it, and it appears that electricity doesn't flow through from the battery to the radio. I wonder which module stops the power supply from reaching the radio (maybe Batter Control Module)?

Many thanks,

 

[mattkh]

Hi Colleagues,

......I have removed the radio and checked the power supply behind it, and it appears that electricity doesn't flow through from the battery to the radio.

That means a fuse between the battery and the radio has blown.

 

[mersum1es]

Check AudioGateway AGW (N93/1).

Mercdes w211 Networking - [PDF Document]

W211 Networking 1 219 Networking (ACB-ICC) 09-03-02 These technical training materials are current as of the date noted on the materials, and may be revised or updated without…

vdocuments.mx

 

[maxiv]

That means a fuse between the battery and the radio has blown.

Hi Mattkh,

Thanks for your reply. Would you please also let me know where I can find this fuse? I have had a look in all the fuse boxes (at least I think in all of them), but maybe there is one that I am not aware of that is responsible for the radio?

Looking forward to your feedback.

 

[maxiv]

Check AudioGateway AGW (N93/1).

Mercdes w211 Networking - [PDF Document]

W211 Networking 1 219 Networking (ACB-ICC) 09-03-02 These technical training materials are current as of the date noted on the materials, and may be revised or updated without…

vdocuments.mx

Hi Mersum,

Thanks for sharing the file, however, I haven't found any info about the AudioGateway. Which page number they explain about this?

Have a great weekend.

 

[maxiv]

Hi Mattkh,

Thanks for your reply. Would you please also let me know where I can find this fuse? I have had a look in all the fuse boxes (at least I think in all of them), but maybe there is one that I am not aware of that is responsible for the radio?

Looking forward to your feedback.

Hi, Sorry please disregard my previous post. I have found the info about Audio Gateway, but I have no clude what is it (a kind of box / fuse / module)?

 

[mattkh]

Looking forward to your feedback.

I don't have access to wiring diagrams.
How and where did you check to see that there was no 12V to the radio..? Perhaps it needs the ignition to be ON.