Partially remove both trim panels for the body pillar

NOTE: Description is for left component only. Procedure on the right side is identical.

Partially removing the trim panel from the body pillar

Unclip clips (2).
Guide the trim panel on the body pillar (1) out of the edge protection lip and the guides (3) in the arrow direction.
The trim panel for the body pillar (1) remains in the vehicle.

Courtesy of BMW OF NORTH AMERICA, INC.