I just bought a 2013 A6 (my first Audi) on an opportunity. It has no NAV. It does have the controls on the wheel and the center console, but when pressed it says NAV not available. The system has Sirius and video DVD capability. I just received the Trunk NAV control box and rear camera control box and the latch with the camera from a wrecked 2013 A6. Does anyone know what else I need? There is a place for the NAV box in the trunk, but there doesn’t appear to be a wiring harness (maybe it’s hidden somewhere). I do have the appropriate VAG-com (Ross-tech) for this model year. I’m an experienced amateur mechanic/electrician.

Thanks.