52 13 050 Replacing Lumbar Cushion On Front Left Or Right Seat

Carry out following tasks beforehand: 

Removing rear panel on front seat backrest:

• Basic seat, refer to 52 13 198 REMOVING AND INSTALLING / REPLACING REAR PANEL ON LEFT OR RIGHT FRONT SEAT BACKREST (NORMAL/MANUAL) 
• Sports seat, refer to 52 15 198 ... REMOVING AND INSTALLING/REPLACING REAR PANEL ON FRONT LEFT OR RIGHT SEAT BACKREST (SPORTS/MANUAL) 

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

Fig 1: Detaching Backrest Cover From Backrest Frame

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Disconnect hoses (2) and (3) from valve housing (1).

Fig 2: Disconnecting Hoses From Valve Housing

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2 Hose (blue) top cushion

3 Hose (red) bottom cushion

Installation: 

Air hoses (2) and (3) must be laid without kinks.

Unhook lumbar cushion (1) from spring wire (2).

Fig 3: Unhooking Lumbar Cushion From Spring Wire

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Version with seat heating:

Slide cable (3) for backrest heating to one side a little.

Press back support (1) a little.

Fig 4: Removing Lumbar Cushion

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Turn lumbar cushion (2) and pull out downwards.

Installation: 

Check lumbar cushion (1) at top and (2) bottom for damage.

Fig 5: Checking Lumbar Cushion

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Air hoses (3) must not be kinked.

Installation: 

Attach lumbar cushion (1) to third wire (2) above spring (3).

Fig 6: Attaching Lumbar Cushion To Third Wire

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Installation: 

Observe cable guide (1) for backrest heating.

Fig 7: Identifying Cable Guide For Backrest Heating

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Lay air hoses (2) without kinks through hole (3).

Installation: 

Check function.