52 14... Replacing left flex shaft for longitudinal seat adjustment drive
WARNING: This page is about a different car, the 2010 BMW 550i, 2009 BMW 550i, and 2008 BMW 550i. 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).