Installed Android Auto onto the RT. I can navigate it with the WunderWheel. Used a three-wire BMW pigtail that plugs into the factory GPS harness to power the unit through the canbus. Unit mounts where the GPS would, using the factory mounting holes.
Works well. Looks great. Easy to use. Turn the wheel left or right to move the "cursor", and the turn signal cancel switch is the "enter" key. Having issues with Google assistant, though. It hears "hey google", but prompts "Bixby". This doesn't happen in either of the cars, so it's got to be the unit. I'll sort it out later, but out of the box.. this is a solid upgrade.