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

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Special tools required:

52 0 050

Necessary preliminary tasks:

Remove Front Seat
Remove Guide Sleeves

Version with seat heating only:

Unfasten plug connection (1) and disconnect.

Disconnect cable straps.

Release wiring harness (2) from cable holders on seat mechanism.

IMPORTANT: Feed the wiring harness carefully through the seat and backrest mechanism as the edges of the frame can be sharp.

Fig 1: Identifying Plug Connection And Seat Mechanism Cable Holder Wiring Harness

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Detach backrest cover (1) from backrest frame.

Fig 2: Removing Seat Backrest Cover

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NOTE: For the following tasks, be sure without fail to:

Remove and install Side Airbag

Detach mounting strip (4) from flexmat.

Carefully pull airbag module (3) with threaded pins out of backrest frame and feed out between padding (1) and inner bag (2).

Set down airbag module (3) to one side.

Fig 3: Identifying Flexmat Mounting Strip, Airbag Module, Backrest Padding And Inner Airbag

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Installation:

Pull inner bag (1) fully over airbag module and threaded pins.

Feed in mounting strip (2) of inner bag (1) through backrest frame.

Insert threaded pins into backrest frame and secure with new nuts.

No inner bag material is permitted to project through the hole in the inner frame.

Install nuts and tighten down.

Tightening torque value 6.5 Nm.

Fig 4: Identifying Inner Bag And Mounting Strip

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Installation:

Inner bag must be between airbag module and backrest frame!

Engage mounting strip (1) of inner bag in flexmat.

Position inner bag (2) smoothly over backrest frame.

Engage backrest cover (3) in backrest frame.

Fig 5: Identifying Backrest Cover, Inner Bag And Mounting Strip

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Pull off backrest cover (1) with padding sideways and towards top from backrest frame.

Fig 6: Pulling Off Backrest Cover With Padding Sideways

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Release all retainers in marked area.

Remove backrest cover from padding.

NOTE: Remove all remnants of retainers from backrest cover and padding.

Fig 7: Identifying Backrest Cover With Padding Retainers Mark Area

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Installation:

Bend new retainer (2) with special tool 52 0 050.

Padding
Retainer
Trim thread in padding
Trim wire in backrest cover
Back-rest cover

Fig 8: Identifying Padding, Retainer And Back-Rest Cover
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Replacement of backrest cover:

Pull trim threads out of backrest cover.

Cut new backrest cover to size and insert trim threads.

Fig 9: Identifying Backrest Cover Cutting Dimensions

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