Retrofitting front seat backrest air cushion - AN91.25-P-0001-01M

Remove head restraint adjustment raise/lower motors (M27m4, M28m4) from driver backrest (1), for this purpose first press motor to right side and then remove downward.

Fig 1: Locating Driver Backrest
Lay front seat backrest (1) down on suitable surface with cover pointing downward and pull backrest cover (2) downward out of clip groove (arrows) on backrest frame (3).

Fig 2: Locating Backrest Cover And Backrest Frame
Pull lug for rubberized fiber matting (4) out of backrest frame (3) at bottom (arrows).

Fig 3: Identifying Fiber Matting And Backrest Frame
Unhook backrest cover (2) from backrest frame (3) all the way around (arrows).

Fig 4: Locating Backrest Cover And Backrest Frame
Completely remove backrest frame (5) with air cushion (5) from rubberized fiber matting and unhook air cushion (5) from backrest frame (3).

Fig 5: Locating Backrest Frame And Air Cushion
Crimp retaining lugs (9a) of reinforcement plate (9) and hook in at bottom of backrest frame (3) on spring wire (3a).
Hook side air cushion (7) with retaining clips (8) into backrest frame (3) and lock in direction of arrow. Screw in screw (11).

Fig 6: Identifying Retaining Lugs, Reinforcement Plate And Backrest Frame
Hook retaining lugs (9b) of reinforcement plate (9) onto spring wire (3a).
Hook connection element (14) into reinforcement plate (9).
Slide pneumatic lines (12) for side air cushions (7) and pneumatic line (13) into connection element (14).
Fasten pneumatic lines (12) and (13) to spring wire (3a) with cable straps at suitable point.

Fig 7: Identifying Connection Element And Reinforcement Plate
Position backrest frame on rubberized fiber matting (4) completely with air cushion.
Ensure that the pneumatic lines are routed out of the backrest toward the front.
Slide lug for rubberized fiber matting (4) into backrest frame (3) from bottom.

Fig 8: Identifying Fiber Matting And Backrest Frame

Left figure:
Hook backrest cover (2) into backrest frame (3) (arrows).
Right figure
Hook backrest cover (2) into clip groove on backrest frame (3)

Fig 9: Identifying Backrest Cover And Backrest Frame
Fold center section of side tensioning element so that rubber straps can be slid into the intended slits and then hook in rubber straps on backrest frame.

Fig 10: Folding Center Section Of Side Tensioning Element
Install head restraint adjustment raise/lower motors (M27m4, M28m4), for this purpose install motor at top first and then press to left until it catches.

Fig 11: Identifying Head Restraint Adjustment Raise/Lower Motors