I am the proud new owner of an Audi A8L with the nav system in the DIS (no video). The dealer did a good job of replacing the manuals but did not include that one. None of the buttons under the tilting cover (hiding the console cup holder) will cause the chosen town to be saved. One of the buttons (looks like 2 car outlines superimposed) doesn't seem to have any function at all. Can someone explain the controls or steer me to a website that has them?

This is a 2000 US model.