Remove/Install Lumbar Support Air Cushion On Front Seat - AR91.25-P-1450FR
Model 257
except code 432 (Dynamic seats left and right)
Model 290
except code 409 (Left and right front multicontour seat)
except code 432 (Dynamic seats left and right)
except code 555 (AMG-Performance Seat)
| Topical note | Information on preventing damage to electronic components due to electrostatic discharge | AH54.00-P-0001-01A | |
| Remove/install | |||
| 1 | Remove seat backrest padding. | Model 257 except code 432 (Dynamic seats left and right) Model 290 except code 409 (Left and right front multicontour seat) except code 432 (Dynamic seats left and right) except code 555 (AMG-Performance Seat) |
AR91.10-P-0003FR |
| 2 | Detach cable ties (4). | ||
| 3 | Unhook lumbar support pneumatic pump (M25/4, M25/5) with protective sleeve from seat backrest frame. | Do not take lumbar support pneumatic pump (M25/4, M25/5) out of its protective sleeve. Otherwise the lumbar support pneumatic pump (M25/4, M25/5) will be damaged. |
|
| 4 | Disconnect electrical connection (6). | ||
| 5 | Detach electrical connector (7). | ||
| 6 | Unhook lumbar support electropneumatic controller unit (N32/23, N32/24) from spring element (5) and route forward, between seat backrest frame and spring element (5). | ||
| 7 | Pass lumbar support pneumatic pump (M25/4, M25/5) forwards and between seat backrest frame and spring element (5). | ||
| 8 | Mark installation position of air cushion unit (3) on spring element (5). | ||
| 9 | Unhook and remove air cushion unit (3) from spring element (5). | ||
| 10 | Install in the reverse order |