Just worked through this. Thanks a ton for the instructions. Took me about 1.5 hours from start to finish and everything works great. As the second owner of the vehicle, it became pretty clear to me that I wasn't the first person to replace this. I could see telltale signs that someone had gone through the process before me. Hope this lasts for a while.

By far the hardest part was getting the white collar snapped into place with the new carrier. It took a LOT of pressure, and I had to be careful to make sure the collar lined up correctly as it had a tendency to turn slightly to match the angle of the cable.

The price for the part has gone up quite a bit since the original post. The cheapest I could find an OEM part was $114 from BMW Parts, Porsche Parts, Audi VW Mini Volvo Saab Mercedes Auto Parts - RM European Auto Parts.