52 17 407 Replacing backrest cover for driver's seat (comfort)

Special tools required: 

• 52 0 050
• 00 9 317

Necessary preliminary tasks: 

• Remove DRIVER'S SEAT .
• Remove BOTH REAR PANELS  on front seat backrest.
• Remove INNER COVER  on front seat.

Optional equipment with seat heating only: 

Unfasten plug connection (1) and disconnect.

Fig 1: Identifying Driver Seat Backrest Plug Connection

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Unfasten plug connection (1) and disconnect.

Fig 2: Identifying Front Seat Backrest Plug Connection

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Optional equipment with climate control only: 

Open Velcro fasteners (1).

Fig 3: Identifying Front Seat Velcro Fasteners

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Unlock and disconnect plug connections (1) for fan.

Fig 4: Identifying Fan Plug Connections

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Release clamps from tensioning straps.

Cut open cable strap (1).

Installation note: 

52 0 050 Bend new clamps closed with pliers.

Replace cable straps.

Fig 5: Locating Driver Seat Cover Clamp

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Disengage backrest cover in lower area from attachment points.

Fig 6: Disengaging Backrest Cover (Lower Area)

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Disengage backrest cover in upper area from attachment points.

Fig 7: Disengaging Backrest Cover (Upper Area)

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Only with rear monitor optional equipment: 

Remove REAR PASSENGER COMPARTMENT MONITOR .

Build date up to 07/2012: 

Release tackers in marked area from carrier plate (1).

Remove clamps (2) at top left and right.

Replacement only: 

New backrest cover must be cut to size.

Slide cutting base under cover.

Place template on leather edge.

Mark outline and cut out.

Fig 8: Identifying Carrier Plate Marked Area And Clamps

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Installation note: 

Mount head restraint to pretension backrest cover.

The seam of the backrest cover must not be wavy and must be flush with the backrest frame upper edge.

Align backrest cover centrally.

Tack backrest cover to carrier plate (1) from the inside to the outside with a pneumatic tacker.

7 tackers on carrier plate at top.

4 tackers on left and right in side area.

52 0 050 Bend new clamps closed with pliers.

Backrest cover must not show any folds.

Version after 07/2012: 

Release screws (1).

Remove cover (2).

Installation note: 

Cover (2) is encoded to prevent incorrect assembly.

Fig 9: Identifying Front Seat Cover And Screws

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Unclip backrest cover (2) with upholstery from backrest width adjuster (1).

Remove backrest cover (2) complete with upholstery towards front.

Fig 10: Identifying Backrest Cover And Width Adjuster

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Installation note: 

Adjusting unit (1) must be secured on left and right in foamed insert.

Clamp of adjusting unit (1) must snap audibly into linkage (2).

Fig 11: Identifying Driver Seat Adjusting Unit And Linkage

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Release all clamps in marked area.

Remove backrest cover from upholstery.

Fig 12: Identifying Backrest Cover Clamps

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Installation note: 

Clamp positions are marked in upholstery.

Bend new clamp (2) 52 0 050 closed with pliers.

1. Upholstery
2. Clamp
3. Trim wire in upholstery
4. Trim wire in backrest cover
5. Backrest cover
   Fig 13: Bending Backrest Cover Clamp

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Pull trim wires out of backrest cover.

Installation note: 

Slide trim wires into new backrest cover.

If necessary, cut into new part.

Fig 14: Identifying Backrest Cover Trim Wires

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Lever out locking strip of head restraint guide with special tool 1 00 9 317 .

Fig 15: Identifying Head Restraint Guide Locking Strip

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