BMW 7 Series: Removing And Installing/Replacing Drive For Backrest Tilt Adjustment (Comfort Seats In Rear Compartment)

Necessary preliminary tasks

• Partially remove LEFT OR RIGHT BACKREST COVER

Installation

• Powerlok screws must be replaced and must not be reused
• Powerlok screws are mechanical screw locks with trilobular threads

Installation

• Microencapsulated screws (Loctite) must be replaced and may not be reused
• Screw connection must be completed within 20 minutes (start of curing)
• Microencapsulated screws must not be retightened
• Clean thread of nut beforehand in event of repeated use

Unfasten plug connection (2) and disconnect.

Release screw (1).

Installation: Replace screw (1).

Tightening torque 67 31 16AZ.

Fig. 23: Identifying Backrest Tilt Adjuster Plug Connection And Mounting Screws

Release screws (1).

Installation: Replace screws (1).

Tightening torque 67 31 15AZ.

Remove drive unit.

Fig. 24: Identifying Drive Unit Mounting Screws

NOTE:

• Carry out FUNCTION CHECK WITH ADAPTER CABLE

Replacement only:

INITIALIZE backrest adjustment motor.

REMOVING AND INSTALLING/REPLACING DRIVE FOR HEAD RESTRAINT HEIGHT ADJUSTMENT (COMFORT SEATS IN REAR CABIN)

Necessary preliminary tasks

• Remove REAR HEAD RESTRAINT MOUNTING

NOTE:

• Carry out FUNCTION CHECK WITH ADAPTER CABLE

Replacement only:

INITIALIZE drive unit for head restraint height adjustment.

REMOVING AND INSTALLING/REPLACING DRIVE FOR HEAD RESTRAINT HEIGHT ADJUSTMENT ON LEFT OR RIGHT FRONT SEAT

Necessary preliminary tasks

• Remove CRASH-ACTIVE HEADREST

Pull backrest cover (1) in direction of arrow from metal lugs (2).

Detach backrest cover (1) on both sides from backrest frame.

Lift cover with padding (1) in upper area over backrest frame.

Fig. 25: Lifting Backrest Cover With Padding In Upper Area Over Backrest Frame

Disconnect plug connection (1).

Unfasten screws (2).

Tightening torque 67 31 3AZ.

Feed out drive for head restraint height adjustment (3) in direction of arrow and remove.

Fig. 26: Feeding Out Drive For Head Restraint Height Adjustment

NOTE:

• Carry out FUNCTION CHECK WITH ADAPTER CABLE

REMOVING AND INSTALLING/REPLACING DRIVE FOR LONGITUDINAL SEAT ADJUSTMENT (COMFORT SEATS IN REAR CABIN)

Necessary preliminary tasks

• Remove COMPLETE PADDING FOR REAR SEAT

Unclip flex shaft cover (1) towards top.

Fig. 27: Unclipping Flex Shaft Cover Towards Top

Pull long sleeve tube (1) with flex shaft out of gearing.

Fig. 28: Pulling Long Sleeve Tube With Flex Shaft From Gearing

Disconnect plug connection (2).

Release screws (1).

Tightening torque 67 31 10AZ.

Remove drive for longitudinal seat adjustment.

Detach flex shafts from drive.

Fig. 29: Identifying Plug Connection With Mounting Screws

Installation

Make sure flex shafts are correctly seated.

Make sure rubber decoupler is correctly seated on drive.

NOTE:

Carry out FUNCTION CHECK WITH ADAPTER CABLE

Replacement only:

INITIALIZE drive unit for longitudinal seat adjustment.

REMOVING AND INSTALLING/REPLACING DRIVE FOR SEAT TILT ADJUSTMENT (COMFORT SEATS IN REAR COMPARTMENT)

Necessary preliminary tasks

• Remove complete PADDING FOR REAR SEAT

Installation

• Powerlok screws must be replaced and must not be reused
• Powerlok screws are mechanical screw locks with trilobular threads

Installation

• Microencapsulated screws (Loctite) must be replaced and may not be reused
• Screw connection must be completed within 20 minutes (start of curing)
• Microencapsulated screws must not be retightened
• Clean thread of nut beforehand in event of repeated use

Unfasten plug connection (1) and disconnect.

Release screw (2).

Installation: Replace screw (2).

Tightening torque 67 31 13AZ.

Fig. 30: Identifying Seat Tilt Adjuster Plug Connection With Mounting Screws

Release screws (1).

Installation: Replace screws (1).

Tightening torque 67 31 12AZ.

Remove drive for seat tilt adjustment (2).

Fig. 31: Identifying Seat Tilt Adjuster Drive With Mounting Screws

Installation: Installation position for controlled pan installation.

Adjust position (A) of seat tilt adjustment from rear stop.

1. = 29.4 mm

Fig. 32: Identifying Seat Tilt Adjustment Position

NOTE:

• Carry out FUNCTION CHECK WITH ADAPTER CABLE

Replacement only:

INITIALIZE drive unit for seat tilt adjustment.

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