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

WARNING: This page is about a different variant/trim than selected.

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

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

Fig 1: Detaching Backrest Cover From Backrest Frame

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NOTE: If necessary, gently heat air hose when firmly seated.
Housing (valve block) must not be unclipped (leaks). If it is unclipped, release screw and clip housing together.

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

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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 At Top And Bottom For Damage

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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 Above Spring

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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).

Fig 7: Laying Air Hoses

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Installation:

Check function.