i didn't see anything different about VW brakes when i went to
this forum.
the only thing that looks different on VW's (at least the ones i was looking at) is that the rear brakes are a pain in the butt to reset, so that the new pads will fit in.
this guy and
this guy both used a cube with prongs on it. not sure what they mean.
some pistons are loosely threaded, so you can screw them back in. but all will retract under pressure. i bought a caliper piston pushing tool from harbor freight for like 5 bucks, but i had been using screwdrivers and muscles for years. the tool is just more efficient.
so in summary, i don't see anything revolutionary that would inhibit you from changing your brakes yourself.
just be careful not to overflow your master cylinder when you push back all the pistons in your calipers to make room for new brake pads.