I GOT MY M3 MIRRORS TO WORK! After a year of having the car and not having working mirrors, THEY ARE BOTH FUNCTIONAL!
The driver's side started working not too long ago, but the adjustments are off (the mirror moves diagonally), but the passenger side now has a new motor (which I paid through the nose for). I adjusted the positioning, as the old motor was maladjusted as well (also moved diagonally in the 1cm distance it did move). Spent quite a lot of time trying to get it seated properly, but with Charlie's help, we prevailed! Thanks so much C...
Personally, I have found DIS/GT1 absolutely useless. I couldn't get it to communicate with my car at all, and I am able to do whatever I want with the other suite of software (NCS Expert, INPA, and eventually WinKFP).
PM me for the translations for NCS Expert.