Good luck man. I feel your pain. I wish I could help but the beast is gone. My advice: think four cylinder turbo. There are so many nice 740 turbo and 940 turbos available for cheap in this used car market. (And from my experience, they get speeding tickets and poor gas mileage just as well as the 1...

You will need the VIN number of the car (if it is the original radio that came with the car). If it is not the original radio (came from another car perhaps or new as a replacement), then there is a serial number in the back of the radio that you will need. The dealer may require proof of ownership ...