52 14... Additional work in event of faulty forward/back adjustment drive

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Necessary preliminary tasks:

Remove TRIMS ON UPPER RAILS

Removing forward/back seat adjustment motor

Unfasten plug connection (1) and disconnect.

Fig 1: Identifying Seat Adjustment Motor Plug Connection

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Unlock retaining tabs.

Lift drive (1) with flex shaft out of guide in direction of arrow.

Pull flex shaft on left and right out of gearbox.

Fig 2: Pulling Flex Shaft Out Of Gearbox

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Slide seat back.

Release screws (1) at front.

Fig 3: Identifying Seat Back Screws

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Slide seat forwards.

Release screws (1) at rear.

IMPORTANT: Cover door sill with protective covers (risk of damage).

Lift out front seat.

Fig 4: Identifying Seat Adjustment Drive Screws

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Installing forward/back seat adjustment motor

Insert short flex shaft (1).

Attach rubber grommet.

Fig 5: Inserting Short Flex Shaft

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Installation note:

Attach rubber grommet at 60° angle to connector housing.

Fig 6: Identifying Connector Housing Rubber Grommet Angle

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Insert long flex shaft (1) with sleeve tube (2) and rubber grommet in plastic part (3).

Fig 7: Identifying Long Flex Shaft And Sleeve Tube

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Installation note:

Attach Unified Parts Group to motor at 60° angle to connector housing so that it cannot twist.

Fig 8: Identifying Motor Connector Housing Angle

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Slide seat rail with opening forwards or back until bushing for flex shaft mounting of worm gear is flush.

Insert flex shaft.

Fig 9: Sliding Seat Rail

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Fig 10: Identifying Adjustment Drive Short And Long Flex Shaft

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Slide short flex shaft (1) into longitudinal seat adjustment gearing square.

Bend long flex shaft (2) upwards and slide into longitudinal seat adjustment gearing.

Clip motor and flex shafts into carrier plate.

Installation note:

PTFE hoses are shrink-fitted onto end pieces.

Check that hoses are free from damage.

Fig 11: Identifying PTFE Hoses

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Installation note:

Make sure flex shaft is correctly fitted on motor
Carpet must not get between seat rails and floor panel in area of attachment points (squeaking noises)
Powerlok screws must be replaced and must not be reused
Powerlok screws are mechanical screw locks with trilobular threads
Insert all screws loose to avoid twisting
Tighten down all screws to specified torque

Tightening torque 52 10 1AZ .