52 13 060 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. Refer to 52 13 198 REMOVING AND INSTALLING / REPLACING REAR PANEL ON LEFT OR RIGHT FRONT SEAT BACKREST (NORMAL/MANUAL)  or 52 17 200 REMOVING AND INSTALLING/REPLACING TOP REAR PANEL ON FRONT SEAT BACKREST (LUXURY SEAT)  and 52 17 202 REMOVING AND INSTALLING/REPLACING BOTTOM REAR PANEL ON FRONT SEAT BACKREST (LUXURY SEAT) .

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

Fig 1: Detaching Backrest Cover From Backrest Frame

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Version with lumbar support and backrest width adjustment only:

Detach hoses (1) and (2) at cutting line (heat with hot air blower if necessary).

Fig 2: Identifying Hoses

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Remove drive unit. Refer to 67 66 010 REMOVING AND INSTALLING/REPLACING LUMBAR SUPPORT DRIVE MECHANISM ON FRONT SEAT, LEFT OR RIGHT .

Unfasten plug connection (1).

Fig 3: Disconnecting Hoses From Valve Housing

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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)

Installation: 

1. Observe cable guide (1) for backrest heating.
Fig 4: Identifying Air Hoses
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2. Lay air hoses (2) without kinks through hole (3).

Slacken screw (1) from inside.

Fig 5: Detaching Valve Housing From Metal Nut

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Detach valve housing (3) from metal nut (2).

Installation: 

Housing parts (1)... (4) must not be unclipped (leakage).

Fig 6: Identifying Housing Parts

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If housing is unclipped, clip valve housing together.

Check function.