Actuating unit version (A):

WARNING: This page does not describe the selected car, but rather 16 other vehicles, including the 2006 BMW 330Ci, 2005 BMW 330xi, 2005 BMW 330i, 2005 BMW 330Ci, and 2004 BMW 330xi. However, it is still accessible from the selected car via links, so may be relevant.

The two adjusting screws (1) and (2) for eccentric disks, have a commercially available Tone screw head which is sealed with hot-melt adhesive.

The adjusting screws (1) and (2) must not be adjusted in the workshop.
The actuating unit may only be removed from and refitted to the same front seat.

Fig 1: Identifying Actuating Unit Version (A) For Front Seat
Courtesy of BMW OF NORTH AMERICA, INC.