52 13 405 Replacing back-rest cover for left or right front seat (normal / manual)

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Remove rear panel on front seat backrest,

refer to 52 13 198 .

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

Fig 1: Removing Backrest Cover From Backrest Frame

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Version with seat heating only: expose seat heating cable:

Remove outer cover on front seat:

Manual operation, refer to 52 13 040 .

Electrical operation, refer to 52 16 040 .

Unfasten plug connection (1).

Pull cable (2) out of holder (3).

Fig 2: Plug Connection And Holder

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Model with seat heating only:

Pull out tongue (1).

Pull cable (2) out of holder (3).

Fig 3: Pulling Cable Out Of Holder

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Model with seat heating only:

Lift out Omega clip (1).

Pull out cable (2) from Omega clip (1).

Model with lumbar supports:

If necessary, disconnect plug connections (3) and (4).

Lift out Omega clip (1).

Fig 4: Omega Clip, Cable And Plug Connections

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Removal/replacement of backrest frame only:

Detach cover (1) on left/right.

CAUTION: Do not under any circumstances turn screw underneath screw (2), this would destroy the seat frame.

Loosen left/right screw (2).

Detach backrest frame (3) with backrest cover upwards.

Installation:

Replace screws (microencapsulated).

Tightening torque: 52 10 2AZ, see 52 10 FRONT SEATS .

Fig 5: Removing Backrest Frame

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NOTE: The operation "Removing complete backrest" ends here.

Removal of backrest cover with padding/replacement of backrest frame only:

Remove both guides for front head restraint,

refer to 52 13 ... Removing and installing/replacing guide for front left or right head restraint

Version with lumbar support only:

NOTE: If necessary, gently heat air hose when firmly seated.

Valve housing must not be unclipped, leakage.

If the valve housing is unclipped, release screw and clip valve housing together.

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

2 Hose (blue), top cushion

3 Hose (red), bottom cushion

Fig 6: Hoses And Valve Housing

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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: Cable Guide And Hoses

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Detach backrest cover (1) at sides towards front and remove with support upwards from backrest frame (2).

Fig 8: Removing Backrest Cover At Sides Towards Front

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NOTE: The operation "Removing backrest cover with support" ends here.

Removal of backrest cover from padding, replacing padding:

Release retainers (1) on left/right of backrest cover (2).

NOTE: Support (3) is reinforced in this area.

Fig 9: Retainers And Backrest Cover

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Release all retainers.

Remove backrest cover (1) from padding.

Remove all remnants of retainers from backrest cover (1) and padding.

Fig 10: Removing Backrest Cover From Padding

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Installation:

Fold in new clip (2) with special tool 52 0 050.

Support
Retainer
Trim thread in support
Trim wire in backrest cover
Back-rest cover

Fig 11: Folding New Clip With Special Tool 52 0 050

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NOTE: The operation "Replacing support" ends here.

Replacement of backrest cover:

Pull trim threads (1) out of backrest cover.

Cut new backrest cover to size and insert trim threads (1).

2 Seat heater cable

Fig 12: Seat Heater Cable

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