I got a list of what was checked when I asked for it. Basic tests really: the car works, has fluids, all options correct, short roadtest.
Yes, the system is only for VW dealers. It would be too costly for them to let people see what's going on

There was a really good check list some time ago on Mk5 forum about collection. I'll try to find it.
Unlike many people I advise spending some quality time walking around your car when you pick it up. The consumer law states that if you had a chance to inspect your car and didn't see a fault you could have and should have you cannot complaint about it afterwards. The reality is you can but it's up to the dealer to take you seriously.