51 33 000 Removing and installing / replacing power window unit in left or right front door

Necessary preliminary tasks: 

• Remove door window glass

Fig 1: Disconnecting Plug Connection From Power Window Motor

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Lever out cover (1) and release nuts (2) underneath. Unscrew nuts (3).

Installation: 

Tightening torque, refer to 51 33 4AZ in BODY EQUIPMENT - TIGHTENING TORQUES - 645CI .

Fig 2: Levering Out Cover And Release Nuts

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Unclip power window unit (3) at clip (1 and 2).

Installation: 

Clips (1 and 2) must not be damaged.

Make sure clips (1 and 2) are in correct position.

Fig 3: Identifying Correct Positioning Of Clips

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Removal of power window unit

Fig 4: Removing Front And Rear Window Lift Rail

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Installation: 

Insert adjusting plate (1) on rear window lift rail (3) correctly into guide on window lift support (2).

Fig 5: Inserting Adjusting Plate On Rear Window Lift Rail Correctly Into Guide On Window Lift Support

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Replacement: 

Release screws (1) and detach flat motor (2).

Tightening torque, refer to 51 33 4AZ in BODY EQUIPMENT - TIGHTENING TORQUES - 645CI .

Installation: 

Carry out normalization of power window unit.

Fig 6: Detaching Flat Motor

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Basic settings of power window unit: 

Height adjustment via wedge (1).

Measurement (A)

=

3 ... 4 mm

Fig 7: Adjusting Height Via Wedge

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Longitudinal adjustment via elongated hole (1) of wedge (2) on power window unit (3).

Fig 8: Identifying Longitudinal Adjustment Via Elongated Hole Of Wedge On Power Window Unit

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