Actuating unit version (A):

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.