51 49 002 Removing and installing/replacing (upper) panel for rear window frame

Release panel (1) at clips (2) and retainers (3).

Fig 1: Identifying Panel And Clips With Retainers

Courtesy of BMW OF NORTH AMERICA, INC.

Installation: 

If necessary, replace faulty clips (1).

Lugs (2) on panel (3) must not be damaged.

Fig 2: Identifying Faulty Clips With Lugs

Courtesy of BMW OF NORTH AMERICA, INC.