Re: factory alignment
If yours has Adaptive Cruise and/or air suspension, see the above two illustrations. The rear camber is set quite negative for handling purposes. I personally prefer to have a lil more tire surface area touching the road. I would more than likely set the rear camber around -.75 degrees and see how it does. With way negative camber, you'll eat up the insides of the tread pretty quick, but you will gain some advantage in handling especially in the twisties.
I would like to add that our Wk2's are FULLY adjustable in the front (camber, caster, and toe) without having the need to additional parts. Camber and toe are the only adjustments that can be performed on the rear.