reset parking brake passat b6

norfolk-boy. I have an issue with a B6 3C Passat EPB, I wanted to change a seized motor on the right rear. I had issues with opening the rear parking brake 53 - PB - Group 007 acivate presed on and it just sat there with no ok left it 20mins and then came out and tried again.
Ive got a b5 and my dad has a b6(07 passat variant), but he's having problems with his e-brake. it would never engage and always gave a parking brake fault. so he took it in today for regular service, they said that its not the switch but they said they cant fix it without replacing some board, which happens to cost $1000 just in parts
reset parking brake passat b6
uens.