I have a new [to me] 2010 TTS with navigation and CD changer [in the glovebox], but no iPod, MP3 or USB inputs. Does anyone know if the Audi AMI can be installed after the factory, or is it only available when the car is built? Or alternatively, are there any after market inputs available that could be connected the the main sound system? Right now I am waiting for a Sirius module to arrive from Germany, but in the meantime I'm stuck listening to FM [ugh!] or my old CD's. Any ideas?