I recently acquired a 2006 E350 wagon. The navigation disc in the trunk is 2005.3 but, the navigation button on the screen says “no navigation” when pushed. I do have the original window sticker that shows Navi included. How do I update and/or get the Navi to work? I’ve ordered a service update disc as well as a 2016 command Navi update disc (they haven’t arrived yet). HELP!!