I just bought the new 2005 A6 3.2. because of limited stock I have to buy one without the GPS navigation installed. I then discovered that in my MMI panel I do have "nav" button and also in the trunk I have some extra wires availaible with empty slot for the DVD drive. Does anybody know what DVD NAV system/computer need to be installed in trunk and how to hook it up with the availaible extra wires provided. Please be descriptive coz I dont know much about these stuff.

Thanks