51 33... Slightly loosen power window regulator to remove door lock in left or right front door

Special tools required:

NOTE: To remove door lock, move rear section of sound insulation (1) toward center.

Necessary preliminary work

Partly remove SOUND INSULATION FROM FRONT DOOR .

Fig 1: Identifying Front Door Rear Section Sound Insulation
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Mark measuring point on window lift rail (1) and inner door panel (2).

Fig 2: Identifying Measuring Point On Window Lift Rail And Inner Door Panel

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Determine distance between window lift rail (1) and inner door panel (2) and note down.

Fig 3: Identifying Distance Between Window Lift Rail And Inner Door Panel

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Slacken off nut (1) on window lift rail (2).

Installation note:

Nut (1) must again be correctly covered with adhesive film.

Tightening torque 51 33 1AZ .

Fig 4: Identifying Window Lift Rail Nut

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Remove dummy plug. Loosen nut (3) with special tool 51 3 300 .

Tightening torque 51 33 1AZ .

Installation note:

Reset the distance you noted down by turning knob (1) on special tool 51 3 300 .

Fig 5: Adjusting Pre-Tension Using Special Tool (51 3 300)

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Installation note:

Check distance between window lift rail (1) and inner door panel (2), repeat previous setting procedure if necessary.

Fig 6: Identifying Distance Between Window Lift Rail And Inner Door Panel

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Detach rear part of window regulator at bottom and pull in direction of arrow.

Fig 7: Disconnecting Window Regulator Rear Part

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NOTE: The door lock can now be guided behind the window lift rail.

Fig 8: Guiding Door Lock Behind Window Lift Rail

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