52 13 405 Replacing backrest cover for left or right front seat

Special tools required:

52 0 050

Necessary preliminary tasks:

Remove OUTER COVER ON FRONT SEAT
REMOVE inner cover on front seat
REMOVE guide for head restraint
Remove HANDWHEEL FOR LUMBAR SUPPORT
Remove ACTUATING UNIT for backrest release

Up to 09/2009:

Remove rear panel on front seat

WARNING: Read and comply with SAFETY REGULATIONS for handling airbag modules and pyrotechnical seat belt tensioners. for handling airbag modules and pyrotechnical belt tensioners.
Improper handling can lead to triggering of the pyrotechnical seat belt tensioner or side airbag, resulting in injuries.

Switch off the ignition!

Only on version without rear panel:

Lever out pin (1) and remove expanding rivet.

Installation note:

If necessary, replace faulty expanding rivet.

Fig 1: Identifying Pin

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Lever out welt from backrest cover in marked area.

Fig 2: Levering Out Welt From Backrest Cover

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Open zip fasteners on left and right.

Fig 3: Locating Zip Fasteners

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Only on version with rear panel:

Lever out clips (1).

Detach backrest cover (2) from backrest frame.

Fig 4: Detaching Backrest Cover From Backrest Frame

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Lever out clips (1).

Fig 5: Identifying Clips

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Unlock backrest and tilt forwards.

This partially relieves torsion spring (1).

Fig 6: Identifying Torsion Spring

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WARNING: Torsion spring (1) is still tensioned. Danger of injury!
In addition, the seat cover may tear if the spring is relieved in an uncontrolled manner (e. g. if the pliers slip).

Using pliers, carefully detach torsion spring (1) from the bolt.

Fig 7: Detaching Torsion Spring From Bolt

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Release bolt (2) and detach torsion spring from axle bolt.

Tightening torque 52 13 06AZ .

IMPORTANT: Risk of damage!

Feed out backrest cover via bolt (1) on the backrest frame.

To make it easier, carefully lift the seat frame shank (2) using a suitable tool.

Fig 8: Identifying Bolt And Seat Frame Shank

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Cut open cable strap (1).

Unlock connector (2) and pull out of connector housing.

Installation note:

Replace defective cable strap.

Connectors are coded against incorrect assembly.

Feed wiring harness out of holders (3).

Fig 9: Identifying Cable Strap, Connector, And Wiring Harness Holders

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Disengage seat cover welt from seat frame.

Unclip cable clip (1).

Feed wiring harness (2) out of seat and backrest frames.

Fig 10: Identifying Cable Clip And Wiring Harness

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Release screw (1).

Tightening torque 72 12 06AZ .

Disengage airbag module in cover pocket (2) from backrest frame.

Fig 11: Identifying Screw And Cover Pocket

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Only on version without rear panel:

Remove backrest cover with upholstery from backrest frame.

Fig 12: Removing Backrest Cover With Padding From Backrest Frame (Without Rear Panel)

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Only on version with rear panel:

Remove backrest cover with upholstery from backrest frame.

Fig 13: Removing Backrest Cover With Padding From Backrest Frame (With Rear Panel)

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Pull airbag module downwards out of cover pockets (1).

Installation note:

Slide airbag module with suspension hooks up to opening in cover pocket.

Cover pocket (1) must not be damaged.

Fig 14: Pulling Airbag Module Downwards Out Of Cover Pockets

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Release all clamps.

Remove seat cover from upholstery.

IMPORTANT: Remove all remnants of clamps from seat cover and upholstery.

Fig 15: Identifying Seat Cover Clamps

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Installation note:

Insert new clamp (2) with special tool 52 0 050 and bend closed.

Upholstery
Clamp
Trim wire in upholstery
Trim wire in seat cover
Backrest cover

Fig 16: Inserting Clamp Using Special Tool (52 0 050)
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