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.