With Steptronic
WARNING: This page does not describe the selected car, but rather 46 other vehicles, including the 2006 BMW M3, 2006 BMW 330Ci, 2006 BMW 325Ci, 2005 BMW M3, and 2005 BMW 330xi. However, it is still accessible from the selected car via links, so may be relevant.
Move selector lever (1) to "P" position (front stop of shifting gate).
Release screw (2). The cable (3) must remain easily movable axially in the holder (4).
Move ignition key to "0" position and remove.
Press interlock lever (5) downwards as far as it will go.
Tighten down screw (2). See Fig 1.