Necessary preliminary tasks

• Remove FRONT DOOR TRIM 

If necessary, feed out cable (1) and disconnect plug connection.

Lever cover (2) out of retainers (3).

Unclip cover (2) in direction of arrow and remove.

Fig 1: Removing Clip Cover In Direction Of Arrow

Courtesy of BMW OF NORTH AMERICA, INC.

Installation: 

Following parts of cover (3) must not be damaged or missing:

1. Retainer (not on E87)
2. Sound insulation

Replacement: 

If necessary, remove treble speaker in quarter light mirror.

Fig 2: Identifying Sound Insulation, Retainer And Cover

Courtesy of BMW OF NORTH AMERICA, INC.