Went to buy a new stereo for my Cayenne ( 2004 ) Best buy didn't have the install kit so went to another local stereo shop called custome sounds, the stereo was a good price, install kit was ok, but then the wire harness was $700, I passed on it and figured I'd do some homeowork. Found a module for the steering wheel control for only $50, now could I simply just hardwire the new radio in?