I just bought a used Audi TT with a nav system. The vehicle was fully inspected by audi. I tried the nav system. Everything works....as long as you don't need to actually do anything othe rthan browse the top level menus. The wheel button doesn't do anythig when I press it in. it doesnt detect clicks....am I missing something here, or is it busted. Good thing the car is on warranty.
Thanks, Ralph