BMW 2011 7 Series Owner's Manual page 65

Locking the doors and
windows
Rear doors
Push the locking lever on the rear doors down.
The door can now be opened from the outside
only.
Safety switch for the rear
Press the button on the driver's door if
children are being transported in the
rear.
This locks various functions so that they cannot
be operated from the rear:
page 46.
Online Edition for Part no. 01 41 2 603 958 - 03 10 500
safety switch, refer to
65