52 14 ... Replacing Left Flex Shaft For Longitudinal Seat Adjustment Drive
WARNING: This page does not describe the selected car, but rather 10 other vehicles, including the 2007 BMW 550i, 2007 BMW 530xi, 2007 BMW 530i, 2007 BMW 525xi, and 2007 BMW 525i. However, it is still accessible from the selected car via links, so may be relevant.
Disconnect electrical plug connection.
Lift drive (1) and flex shaft (3) out of guide (2) in direction of arrow.
Detach flex shaft (3) (plug connection).
Loosen screws (1).
Remove drive (4).
Detach flex shaft (3) with holder (2).