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) .

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

Fig 1: Removing 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: Locating Hoses

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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. Refer to 67 66 010 REMOVING AND INSTALLING/REPLACING LUMBAR SUPPORT DRIVE MECHANISM ON FRONT SEAT, LEFT OR RIGHT or 67 66 013 REMOVING AND INSTALLING / REPLACING DRIVE UNIT FOR LUMBAR SUPPORT ON LEFT OR RIGHT FRONT SEAT (SPORTS SEAT) .

Unfasten plug connection (1).

Fig 3: Disconnecting Hoses

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3 Hose (blue) top cushion

4 Hose (red) bottom cushion

5 Hose (transparent), lumbar support pump (on black)

Installation: 

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

Fig 4: Identifying Air Hoses

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Slacken screw (1) from inside.

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

Fig 5: Removing Valve Housing From Metal Nut

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Installation: 

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

Fig 6: Locating Housing Parts

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If housing is unclipped, clip valve housing together.

Check function.