drjlt

Hi,

Is it possible to disable the multi-zone climate control? My car has quad-zone CC. When I removed the telephone wiring from the center console, I mistakenly dismantled one of the two plugs going to the rear CC controls. [Just checked again, the plug I broke is only for the phone. The second plug for the rear CC is to be connected to the rear TV, which I have removed. I guess that's not the reason why it's not working.] I prefer having a single zone, but there doesn't seem to be much information about syncing the AC zones for cars of this vintage.

Can it be done?

Photos of the broken plug removed.

drjlt

I have found this interesting method:
https://mbworld.org/forums/s-class-w...el-2004-a.html

e350forme

if you turn off auto , doesn't that turn off of syncing?

drjlt

What do you mean? The temperatures don't seem to be sync-able.

drjlt

I checked the climate control error codes. There's 1849, which is saying that the CAN communication to the rear control unit is cut.

There are two 10-pin plugs on the rear control unit, one black and one white. The black one should be ok. Originally, a cable from the TV is plugged into the white one. I think someone who was in there made a mistake, as there is another white plug that was made into a loop, presumably connected to the TV signal. I plugged that one into the rear AC control unit, but no joy. (The TV has been removed and not needed.)

Maybe at some point I'll remove the center console when I try to reclaim the storage space under the armrest (presumably from the phone or TV module?).

tim687

I don't think it's possible to sync the temperatures of the whole car together.

drjlt

Good news: I fixed the rear control.

Since I reconnected the white plug that was previously connected to the TV signal, I figured that maybe a fuse was blown. Indeed, one of the 15A fuses (fuse 68) was blown. Replacing it fixed the communication to the rear control module.