Replacing Valve Housing For Lumbar Support, Front

Removing And Installing/Replacing Valve Housing For Left Or Right Lumbar Support, Front (Normal/Manual)

Carry out following tasks beforehand:
- Remove rear panel on front seat backrest.







Detach backrest cover (1) from backrest frame (2).







Version with lumbar support and backrest width adjustment only.

Detach hoses (1) and (2) at cutting line (heat with hot air blower if necessary)
1 Hose (blue) upper cushion (lumbar support)
2 Hose (red) lower cushion (lumbar support)
3 Hose (white) right cushion (backrest width adjustment)
4 Hose (white) left cushion (backrest width adjustment)
5 Motor pump unit (drive unit)
Remove drive unit.







Unfasten plug connection (1).


NOTE: If necessary, gently heat air hose when firmly seated.


Disconnect hoses (3)... (5) from valve housing (2).
3 Hose (blue) top cushion
4 Hose (red) bottom cushion
5 Hose (transparent), lumbar support pump (on housing black)







NOTE: For purposes of clarity, shown here without valve housing.


Installation:
Observe cable guide (1) for backrest heating.
Lay air hoses (2) without kinks through hole (3).







Slacken screw (1) from inside.
Detach valve housing (3) from metal nut (2).







Installation:
Housing parts (1)... (4) must not be unclipped (leakage).
If housing is unclipped, clip valve housing together.
Check function.