The heavy-duty hatch must be lubricated (see chapter "Lubrication of all elements"). Information about the electric sunroof can be found in the chapter "Instruments and auxiliary devices".
Non-hermetic sliding sunroof
The reason for the sliding sunroof not being watertight is because the drain pipes, one connected to each of the four corners of the sliding sunroof frame, are clogged. Although water can get in, it also needs to be able to drain.
Therefore, if the sliding sunroof is not sealed, it is necessary to clean all four drain hoses.
Both rear drain holes are difficult to access even with the hatch open (shine a light into the hatch box).
The front drain hoses exit at the height of the lower hinges of the front doors. Both rear hoses end under the sides of the rear bumper (you need to disconnect the sides, see section "Removal the rear bumpers").
This article was previously published on the resource AudiManual.ru