Hey Guys; If your a regular to the forum, last fall I traded in my 07/A6 for a 2012 caddy cts4 coupe. I drove it for the winter and a few months ago traded back for the same car I traded. Nuff said. I do miss the XM option and the Bluetooth. Question is do they make an aftermarket system that will fit the stock harness without having to change amps and speakers. Kinda like PLUG AND PLAY that I could do myself with out to much of a hassle.