Audi S3 A3 8V saloon sportsback rear window regulator replacement

i saw there was no info on how to remove and replace the window regulator on the S3 A3 8V anywhere on the net or youtube, so I thought i would make one to save you guys time.
i bought the regulator second hand, but these are also available new.
here is the part code you will need:
8V4 839 461