So I just bought a 2008 Audi Q7 from a dealership and when I test drove it I tested out the NAV and everything worked fine. I bought the car the same day and the dealership delivered the vehicle about a week later. Next morning I went to use the NAV just for fun......screen says "No NAV installed". I was thinking that maybe someone took the DVD out or something, but I don't know where it would go. I heard that it goes into a unit in the back of the vehicle where the spare is, but I can't seem to find it. I am now on the war path and am pissed!!! Any advice would be awesome!