I tried searching but didn't turn up anything on this.
I have a 1990 US version 750iL, built 7/89, 182k miles.
I have a pair of heated rear seats that I bought from a friend of a friend who is pretty knowledgeable on E32s. In taking mine out, I don't see any differences in the wiring coming from the seats, bottom or back. I do see some additional wiring coming from an unused connector on the heated base. I don't see any additional wiring on the heated seat back.
Am I to assume that only the bases are heated on the rear seat, and to install them all I need to do is install the seat backs and find the wiring in the console and add the switches?
Thanks,
vince