Remove/install multi-contour backrest air cushion - AR91.25-P-1740M

MODEL 220.0 /1 with CODE (404b) Multicontour backrest driver seat with CODE (405b) Multicontour backrest passenger seat center air cushion 

Fig 1: Identifying Multi-Contour Backrest Air Cushion Remove/Install Components - Model 220.0 /1

	Remove/Install
1	Remove driver's seat cushion	up to 31.8.02.	AR91.10-P-1070M
		As of 1.9.02.	AR91.10-P-1070MB
2	Remove covering on front seat backrest	Only remove backrest covering with rubberized fiber matting from backrest frame	AR91.18-P-1820M
3	Pull off all pneumatic line from the T-piece (5, see enlarged section) on the back of the center air cushion (6)
4	Pull all pneumatic lines out of the tongues on the back of the center air cushion (6)
5	Pull strip of adhesive tape on the top part of the center air cushion (6) off the backrest frame	Installation:  Fasten the upper air cushion of the center air cushion (6) with strip of adhesive tape so that they cannot fold down.
6	Unfold lower tongues (see arrows) of the reinforcement plate (10) downwards out of the backrest frame	Installation:  Secure tongues after turning around on grid.
7	Press out the corners (see arrow, top) of the reinforcement plate (10) on the right and left next to the head restraint guides	Do not damage the corners of the reinforcement plate (10). Installation:  The upper retainer tabs (see arrow, bottom) of the reinforcement plate (10) must be guided into the second grid brace from above.
8	Detach pneumatic lines (8) from seat frame (9) and re-convert up to the center air cushion (6)	Ensure that it cannot chafe. Installation:  Fasten the pneumatic lines (8) to the seat frame (9) with a tie strap (see arrow).
9	Pull center air cushion (6) upwards off the backrest frame
10	Install in the reverse order
11	Carry out function check of multicontour backrest