Seat Heater Help

[JCL]

So, our 2007 LCI X3 3.0si (June production) has heated front seats. They work great. No heated rear seats; they were only available together with other options that we didn't want when we ordered the vehicle.

Usually there is no one in the back of the X3, but we have occasion to make several long winter trips with a passenger. I had read somewhere (here or on another board) that the LCI X3s all had the rear seat heaters installed, just not necessarily connected. That is what I need to determine. I am not going to buy new seats, but if I can get away with a switch and a short wiring harness, as well as loosening the seat upholstery to fish the cable out, no problem.

RealOEM shows a single switch for the rear seat heaters. I am not sure if it replaces our Aux In at the rear of the centre console, or the trim panel is different to hold it as well. Not sure if it is supposed to be one or two switches, either. I haven't opened the console yet. It would be straightforward to buy and install the switch or switches if the wiring is there.

RealOEM shows that the rear seat covers are one part number (for each colour) for vehicles with or without rear seat heaters. Makes sense from a parts stocking point. However, that may just be for replacements, and not for factory builds.

So, when I removed the rear seat, I don't see wiring out in the open. I can go digging for it, but it isn't obvious for either the heaters (cushions) or the wiring harness. It would be too easy if it was just laying there.

Has anybody done this before? Alternatively, has anyone with rear seat heaters on an LCI X3 had the rear seat bench out? It lifts out very easily, and my question is where the wiring exits the seat cushion. And do you have one switch or two?

Thanks in advance for any help or suggestions.