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 pretension.

Tighten nut (3).

Tightening torque 51 35 4AZ .

Check adjustment, repeat procedure if necessary.

Fig 1: Slackening Nut With Reversible Ratchet Of 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: Caution For Positioning Bowden Cable

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: Slackening Nut Using Reversible Ratchet Of Special Tool (51 3 300)

Courtesy of BMW OF NORTH AMERICA, INC.

Checking run-in of door window glass: