How exactly does one go about making an E32 rear seat to fit an E34. I have a 535i with natur interior that is in decent shape, but the driver's seat is torn and the front seat heating is no longer operable. There is an E32 with a very nice interior that I could get at a good price locally, its a 735i. My car currently has headrests to the E32 headrests look promising, but what modification would I have to do to make everything fit?