Removing both C-pillar trim panels

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

Remove C-pillar trim panel

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

Disengage the C-pillar trim panel (1) inward from the clamp (2) and the clips (3).
Feed the C-pillar trim panel (1) out and upwards.

Courtesy of BMW OF NORTH AMERICA, INC.