electric window lifter front lubricating Audi 80B4

Hello guys....after looking for an annoying noise yesterday I dismantled the door panel at the front right, and in the door of course everything was fixed, I thought, lubricate the ropes and running rails of the window lifter. Only how can you get the most out of it? There is a black sheet where the engine is screwed. This is probably screwed to another black sheet metal part with several screws. In the book as I best do myself, it says, I should completely expand the door frame............can you not only partially do this to get to the few parts? Because the window lifter should not be replaced.........