Remove/install lumbar support air cushion on front seat

AR91.25-P-1450ME

Remove/install lumbar support air cushion on front seat

13.08.2019

Model

167

with code U22 (Lumbar support adjustment)

1

Electrical connectors

M25/4

Driver seat lumbar support pneumatic pump

2

Retaining clips

M25/5

Front passenger seat lumbar support pneumatic pump

3

Lumbar support

N32/23

Driver seat lumbar support adjustment control unit

4

Backrest frame

N32/24

Front passenger seat lumbar support adjustment control unit

Topical note

Information on preventing damage to electronic components due to electrostatic discharge

AH54.00-P-0001-01A

 

Remove/install

1

Remove cover from front seat backrest without loosening the padding from the cover.

AR91.18-P-1822ME

2

Release and disconnect electrical connections (1).

3

Unclip retaining clips (2).

 Dismantling tool

*000589956300

4

Sever cable tie at lumbar support pneumatic pump (M25/4 or M25/5).

 Installation: Replace cable tie.

5

Detach lumbar support (3) from seat backrest frame (4) and remove.

 The lumbar support (3) is one unit. It consists of the lumbar support adjustment control unit (N32/23 or N32/24), lumbar support pneumatic pump (M25/4 or M25/5), air cushion and hoses; the unit cannot be disassembled.

6

Install in the reverse order