****UPDATE****
Nav actually does not work. whirledpeaz was right, you DO need a new unit for it. You can technically enable the Nav app, but nothing will ever load. You can also enable seat heaters and the dual zone climate control on the screen but none of these will actually work.
I have, however, been able to update the system from Sync 3 1.0 straight to Sync 3 2.2, which allows me to use Android Auto and Apple CarPlay. Apple CarPlay does not yet work as it needs a new usb hub (which I just ordered and it's on the way). However, android auto works great! It works unbelievably smooth. Using Google Maps on it is all the nav I will ever need to be honest.
I have also changed the lame stock splash-screen to this awesome thing.