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 Adjustment Area

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:

5134154 Adjusting rear left or right front window