Necessary preliminary tasks

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Remove RIGHT LUGGAGE COMPARTMENT TRIM PANEL
Remove BATTERY COVER
Partially detach insulating mat

Release screws (1) and pull back device holder (2).

Fig 1: Pulling Back Device Holder

Courtesy of BMW OF NORTH AMERICA, INC.

Unfasten plug connection (1) and disconnect.

Unlock catch (2) in direction of arrow and remove control unit for comfort access system (3) upwards from device carrier (4).

Fig 2: Identifying Plug Connection And Catch

Courtesy of BMW OF NORTH AMERICA, INC.