Hi, 2002 S3 with a BOSE Symphony 2 headunit that's double din. I've looked *everywhere* for replacement dash kits so I can fit a regular double din headunit into the car but they don't seem to exist... Most people say you have to buy an A4 (?) adaptor, modify it then buy a collection of wiring adapters to mate it all up to the speakers properly. Is changing the headunit on the S3 simply not done then? I'd like to buy a touchscreen double din sat nav / bluetooth / ipod / all singing all dancing unit but information appears thin on the ground. Cheers!