I recently purchased a 2015 A3 8V with the non-nav MMI unit. I am looking to upgrade to the navigation verson. The unit I am considering purchasing the main unit, navigation control unit with touch pad, high resolution display and GPS antenna. Can someone help?? 1) Does anyone have any experience upgrading the A3 8V? Can you please help with the steps and installation process? 2) Do I need to visit the dealer to re-program? 3) Do I need any additional parts? 4) Can Audi Connect be used? 5) Can I eventually add a backup camera? Please excuse my newness to the forum!