Necessary preliminary tasks

• Remove AIRBAG UNIT

Release screws (1).

Detach decorative trim (3) in direction of arrow from holders (2).

Disconnect associated plug connection and remove complete decorative trim (3).

Fig 1: Detaching Decorative Trim In Direction Of Arrow From Holders

Courtesy of BMW OF NORTH AMERICA, INC.

Installation: 

Make sure electrical leads are correctly routed.

Feed wiring harness (4) out of associated holders.

Release screws (1) and remove both multifunction steering wheel switches (2) from decorative trim (3).

Installation: 

Make sure there is a uniform gap between both multifunction steering wheel switches (2) and decorative trim (3).

Fig 2: Identifying Screws, Multifunction Steering Wheel Switches And Decorative Trim

Courtesy of BMW OF NORTH AMERICA, INC.