Remove/install lumbar support air cushion on front seat

AR91.25-P-1450MFA

Remove/install lumbar support air cushion on front seat

13.08.2019

Model

118, 177, 247

with code U22 (Lumbar support adjustment)

Shown on driver's seat with code 7U3 (Seat type variant 3)

1

Lugs

2

Electrical connector

3

Electrical connector

4

Expansion rivet

5

Spring element

6

Air cushion

 Caution

Risk of injury caused by scraping or cutting body parts on sharp vehicle parts

Always wear protective gloves when working on or near sharp and non-deburred vehicle parts.
Deburr repair panels.

AS00.00-Z-0017-01A

Topical note

Information on preventing damage to electronic components due to electrostatic discharge

AH54.00-P-0001-01A

 

Remove/install

1

Remove cover together with padding from seat backrest.

Model 118, 177, 247
with code U22 (Lumbar support adjustment)

Model 118, 177, 247
with code 7U1 (Manually adjustable front seats)
with code U22 (Lumbar support adjustment)

AR91.10-P-8656MFC

Model 118
with code 7U3 (Sport seats, front)
with code U22 (Lumbar support adjustment)
Model 177
with code 7U3 (Seat model variant 3)
with code U22 (Lumbar support adjustment)

AR91.10-P-8656MFB

Model 118, 177, 247
with code 7U2 (Luxury front seats)
with code U22 (Lumbar support adjustment)

AR91.10-P-8656MFA

2

Release and disconnect electrical connection (3).

3

Release and disconnect electrical connector (2) at driver's seat lumbar support pneumatic pump (M25/4) or front passenger seat lumbar support pneumatic pump (M25/5).

4

Unclip tabs (1) of expansion rivets (4) and release air cushion (6) from spring element (5).

 Installation: Replace expansion rivets (4) if necessary.

 The expansion rivets (4) remain in the air cushion (6).

5

Guide air cushion (6) out of spring element (5).

 Installation: Ensure that the air cushion (6) is seated correctly.

6

Install in the reverse order.