Sunroof does not operate correctly

Symptoms

["Start the engine.", "Close the sunshade and sunroof completely if opened.", "Release the sunroof control lever.", "Push the sunroof control lever forward in the direction of close (about 10 seconds) until the sunshade slightly moves. Then, release the lever.", "Push the sunroof control lever forward in the direction of close, until the sunroof operates as follows again: Sunshade Open -> Glass Tilt Open -> Glass Slide Open -> Glass Slide Close -> Sunshade Close.", "Then, release the lever."]