Couple of points having just done all the brakes on my car & serviced it.
1. VW in their workbooks or at factory..DO NOT grease the pad "ears" & contact points for the rear callipers. Result?:- pads rust to the calliper brackets. They do recommend greasing the fronts in the books but again do nothing at the factory.
2. VCDS/OBD11 is required to retract the EPB motor spindle. You still have to push the pistons back in, straight push as no "wind back" mechanisms, like a manual handbrake. (you have done this effectively with the VCDS command).VCDS is required again to extend & reset.
3. I fitted all new disc/pads, & greased all the slider pins with the correct TRW PFG-100 grease...then went over all the pad ears & back plate contact points & greased with Loctite LB-8009 (1300C high temp, stainless steel safe, wash out resistant, calcium/graphite grease)….result is way more freewheeling & faster acceleration as the brakes are no longer "part on"...