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

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Press and hold the switch in the "Lift" direction

Fig 1: Holding Switch In Lift Direction

Courtesy of BMW OF NORTH AMERICA, INC.

In the event of delayed starting or sudden stopping of the slide/tilt sunroof, continue pressing the switch in the "Lift" direction
After reaching the lift end position (A), keep the switch pressed for approx. 15 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 Slide/Tilt Sunroof In Lift End Position

Courtesy of BMW OF NORTH AMERICA, INC.