Roof Insert, Checking Function: Procedure:
WARNING: This page does not describe the selected car, but rather 9 other vehicles, including the 2018 Audi S6, 2018 Audi A6 Quattro, 2018 Audi A6, 2017 Audi S6, and 2017 Audi A6 Quattro. However, it is still accessible from the selected car via links, so may be relevant.
-- Open and close the roof insert completely. While doing so, pay attention to any unusual noises and any difficulty moving.
-- If there are any unusual noises or the movement is not smooth, clean and lubricate the roof insert. Refer to SLIDING/TILTING SUNROOF INSERT, CLEANING AND LUBRICATING .