Adjusting pretension

Slacken nut (3) with reversible ratchet (2) of special tool 51 3 300 (consisting of 51 3 301, 51 3 303 and 51 3 304 ).

Turn knob (1) on special tool 51 3 300 to turn bolt (4) and thereby alter the pre-tension.

Tighten nut (3).

Tightening torque 51 35 4AZ .

Check adjustment, repeat procedure if necessary.

Fig 1: Turning Knob Using Special Tool (51 3 300)

Courtesy of BMW OF NORTH AMERICA, INC.

Soft-Close-Automatic design:

To ensure the adjustment clearance in area (A), the bowden cable (1) of the Automatic Soft Close system must lie in the recess in area (B) (risk of damage).

Fig 2: Identifying Bowden Cable And Soft-Close-Automatic Adjustment Ranges

Courtesy of BMW OF NORTH AMERICA, INC.

Bring rear door window glass into uppermost position.

Slacken nut (3) with reversible ratchet (2) of special tool 51 3 300 (consisting of 51 3 301, 51 3 303 and 51 3 304 ).

In the relaxed position of the adjustment device, use the knob (1) of the special tool 51 3 300 to block the pin (4).

Tighten nut (3).

Tightening torque 51 35 4AZ .

Check adjustment, repeat procedure if necessary.

Fig 3: Blocking Pin Using Special Tool (51 3 300)

Courtesy of BMW OF NORTH AMERICA, INC.

NOTE: After completing adjustment work, it is essential to INITIALIZE the power window unit.

Checking run-in of door window glass: