I got my car from the VAG workshop today, after 3 weeks!
They changed the microswitches around the gearstick, and also the giver for the gearbox axis rotations. Although they couldn´t make a proper ground adjustment, and was about to switch the control box for the gearbox.
However, they also checked at last the bar going from the gearstick to the gearbox, and found that the ballscrew at the gearbox was about to loosen from the gearbox by vibrations.
When tightened the ballscrew, everything works fine again!
I also got 700 Euro more poor by this.
I just cant understand why the workshop didn´t check all mecanic parts first of all, instead of running into the wall by just checking the electronic parts.
However, I´m happy of having a working car again.
Stefan