I used to have a VW with electrical park brakes
It was all fun and games untill you needed new pads
You know how on a regular hydraulic brake caliper the wear of the pad is compensated by pushing the piston out further which is accomplished by the brake fluid allready present in the reservoir?
well, with this set up, the park brake was engaged by a servo motor, which also took care of the adjustment as the pad wore down
which means that with brand new pads, the servo would reet in a zero position, but it would adjust the piston out furter as the brake pads wore
So imagine this, your pads are wore out, the pistons now rest about 1/4 inch further out per side then when new...how are you gonna reset this servo to back the piston off ?
(the traditional "slap a C clamp on it and backbleed it" approach no longer works)
So now, you iether need to take it in to the dealer to have them hook it up to the computer to back it off, or figure out a way to hotwire this servo to a 12 volt source to back it off
yeah, great idea there
Park can be engaged, there is a place to use a small screwdriver or pen to bypass the shift lock and put it in park. All you have to do is look in the owners manual.