67 31 500 Removing and Installing/Replacing Forward/Back Seat Adjustment Drive Unit

67 31 500 Removing And Installing/Replacing Forward/Back Seat Adjustment Drive Unit







Necessary preliminary tasks:
- Raise front seat as far up as possible
- Remove trims on upper rails
- Procedure in event of faulty drive for forward/back seat adjustment:
Additional work in event of faulty drive for forward/back seat adjustment







Removing forward/back seat adjustment motor:
Unfasten plug connection (1) and disconnect.







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 gearing.







Installing forward/back seat adjustment motor:
Insert short flex shaft (1).
Attach rubber grommet.







Installation:
Attach rubber grommet at 60° angle to connector housing.







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







Installation:
Attach assembly to motor at 60° angle to connector housing so that it cannot twist.







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







Slide short flex shaft (1) into forward/back 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:
PTFE hoses are shrink-fitted onto end pieces.
Check that hoses are free from damage.







Installation:
- 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.







NOTE: Carry out function check with adapter cable







Replacement:
Initialise backrest adjustment motor.







Replacing in vehicles with production dates up to 09/2009:
- Carry out vehicle programming and encoding

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