I have to admit, in my haste to dig in and have some mod'in fun, I didn't take many pictures... just a couple of the plug itself so Keith could update his documentation. I have mapped out the Audi wiring switch as well, that will undoubtedly make it into his documentation. The good news is that it was only wire color differences from the VW application, the "move pin 18 to pin 8" instructions applied perfectly. FWIW, it was pretty standard fare as far as getting to it: remove the glove box, pop the side kick panel off (2 screws) to be able to 'peal' the carpet back and expose the box. It is basically at the very top of the foot well, if you pull the carpet back even a little bit the silver box you see is it. Three nuts at the left, bottom and right edges of it and it comes free. The worst part of the mod: My 6 year old keeps asking me to hit the "siri" button so he can ask her silly questions.

I'm not sure if Keith will want me to post his total price here, but Costar charges $279 for the box for GM PNP and his cost is a small amount more than that and he of course mods the board as well as supplying the costar box (you pay him the full amount). You might be able to find the audi BT box in that price range, but I still think in our cars not having that MFSW (not that I want one) makes that box a little less convenient.