Hello, I have a 2005 (55) A6 S-line with the colour screen in the dash and 12 CD changer with the extra Audi Manuals CD in one of the drives. It has a NAV and TEL buttons but when pressed it says not connected. I have access to a crashed A6 with the sat nav system fitted. Is it just a case of transfering the DVD drive from the rear stack of the crashed car and putting it into mine? What else do I need to do, does VAG COM need to be programmed to let the car know its there? Obviously I will need to install a GPS antenna also, I was planning on installing this on the rear parcel shelf with a view of the sky. In addition, I think this car has a bluetooth box. Can anyone confirm if I need to remove the microphone from this car (and where is it) or do they all come with the Microphones? Thanks. If anyone can advise of this process that would be great. Thanks.