I'm trying to fix a repeated failure of the front windows, sunroof, mirrors, seats, and A/C. I do have individual door modules, and have changed one of those, and experimented with pulling individual fuses to no avail. The only thing that resets everything (except A/C, which has never worked unless you jump 12V to the clutch), is to pull the battery cable or one of the large fuses at the fuse box. So I've been told, the 'Comfort Module' ties everything together. The part number for this, 202 820 092 6, is used by many different chassis for a good number of years based on what I can find on these. Honestly though, information is difficult to come by on these, and there are NO scan tools aside from the dealership's that can read them. Lots of errors in the Bentley manuals as well.