54 0 ... Notes on steel and glass slide/tilt sunroofs (initialization/normalization/learning of characteristic curve): Normalization.

Press and hold the switch in the "Lift" direction.
In the event of delayed starting or sudden stopping of the slide/tilt sunroof, continue pressing the switch in the "Lift" direction.

Fig 1: Pressing And Holding Switch
After reaching lift end position (A), keep switch pressed for approx. 20 seconds further.
Normalization is completed when the slide/tilt sunroof in lift end position (A) presses again briefly in the direction of position (B).

Fig 2: Identifying Positions A And B
Release switch.