Little Update had the car for two weeks at an Audi shop.

Apparently there are four (4) adaptation that need to be run once a controller or rear is replaced none of which can be done on VCDS. The shop had to borrow the ODI computer from Audi to reset the (SVN code) & adaptations and make the newest controller work with the system.

Supposedly all this fixed the problem and I now have AWD again. We will see tonight when I try to launch the car LOL!