Remove/Install Multicontour Backrest Air Cushion - AR91.25-P-1740FR

Model 257 

with code 432 (Dynamic seats left and right) 

Model 290 

with code 432 (Dynamic seats left and right) 

except code 409 (Left and right front multicontour seat) 

Shown on model 257 

Courtesy of MERCEDES-BENZ USA

	Remove/install
1	Remove seat backrest padding.	Model 257 with code 432 (Dynamic seats left and right) Model 290 with code 432 (Dynamic seats left and right) except code 409 (Left and right front multicontour seat) except code 555 (AMG Performance seats)	AR91.10-P-0003FR
2	Remove front multicontour seat control unit.	Model 257 with code 432 (Dynamic seats left and right) Model 290 with code 432 (Dynamic seats left and right) except code 409 (Left and right front multicontour seat)	AR91.25-P-1900FR
3	Unhook mounting brackets (arrows) from air cushions (1, 5) on covers (2, 4).
4	Release bolts (7, 8) and pull out.	Pull out pin (7, 8) far enough to enable the air cushions (1, 5) to be removed.
5	Expose pneumatic line from air cushions (1, 5).
6	Remove air cushions (1, 5).
7	Expose pneumatic line from air cushion (3).
8	Remove air cushion (3) from spring frame (6).
9	Install in the reverse order