Adjusting left or right front side window (M4 Convertible)

Special tools required: 

• 2 356 862
• 51 3 240
• 51 0 341
• 51 0 342
• 2 351 398

Configuring the correct setting will fulfil the following properties: 

• Seal against water ingress
• No wind noise
• No rattling
• No unintentional reversing of side window during closing action (anti-trap safety function)

Prerequisites for correct adjustment: 

• Vehicle is supported on wheels at ground level
• After being lowered from the vehicle hoist, the vehicle must be rolled 3 to 5 meters forward and back in order to relieve chassis and body tension
• Correctly adjusted FRONT DOOR .
• Recharge BATTERY (read and comply with notes on lithium ion battery) (Full operability of the power windows during the adjustment procedure is only assured with an external power supply)

Observe the checking and adjustment sequence!

1. Door window glass retraction depth/longitudinal direction
2. Door window glass preload

1. Retraction depth/longitudinal direction
   1. Retraction depth/longitudinal direction ideal setting 

      Open door.

      Connect special tool 2 356 862 to measuring points (A to C) on side window.

      Close door.

      Measure longitudinal direction (A) and retraction depth (B and C) (refer to next procedural step).

      Courtesy of BMW OF NORTH AMERICA, INC.

      Area	Dimension	Position of special tool 2 356 862
      A	19 ±1 mm	Centrally on mirror triangle
      B	6 - 1 mm	30 to 40 mm above exterior mirror
      C	8 - 0.75 mm	100 mm in front of outer edge of door window glass

      CAUTION: Door must open and close without the door window glass touching the roof trim strip (risk of damage).
      NOTE: Check play of special tool 2 356 862 to edge of door window pane before each measurement.

      Connect special tool 2 356 862 with 5 mm holder (1) to the door window glass while in a locked state (A).

      Close door and undo lock (2).

      Read retraction depth on the scale.

      Courtesy of BMW OF NORTH AMERICA, INC.

      NOTE: Special tool 2 356 862 rest against edge of side window without play for each measurement.
   2. Adjust retraction depth/longitudinal direction 

      Remove WEATHER STRIP  on outside of front door.

      NOTE: Avoid damaging door window glass and window cavity through tool use.

      When configuring setting, ensure that all special tools 2 356 862 continue to touch edge of door window pane without any gaps.

      Courtesy of BMW OF NORTH AMERICA, INC.

      Attach siphon to center of side window.

      Slacken multipoint head cap screw (1)51 3 240 with special tool until side window with siphon can just be moved with little effort.

      NOTE: Always slacken both multipoint head cap screws to avoid tension in the power window system.

      Adjust longitudinal direction and retraction depth of door window glass.

      Tighten multipoint head cap screw (1) using special tool 51 3 240 and torque wrench.

      Tightening torque 51 33 3AZ .

      CAUTION: Do not release or tighten multipoint head cap screw over inside of door (removed door trim panel; threaded bolt may snap).

      Check setting, repeat process if necessary.

      Courtesy of BMW OF NORTH AMERICA, INC.

      NOTE: Checking run-in of door window glass:

      Door window glass must strike the inside of the gasket.

2. Preload
   1. Preparations 

      Open door; move door window pane into uppermost position, if necessary.

      Insert special tool 51 0 341 in rotary striker of door lock and manually lock rotary striker (short lift activation).

      Close the door carefully up to the point where the special tool 51 0 341 magnetically adheres to the striker (defined door opening angle for measurement).

      Courtesy of BMW OF NORTH AMERICA, INC.

   2. Preload ideal setting 
      NOTE: No force must be exerted on the door or door window pane during measurement.

      Place special tool 51 0 342 immediately next to rear side window contacting on window guide gasket (1) and door window (2).

      Determine dimension for preload between window guide gasket (1) and outer edge of door window (2).

      Courtesy of BMW OF NORTH AMERICA, INC.

      Dimension = 30 ±1 mm

   3. Adjust preload 

      Open door and remove sealing cap on door window frame.

      Feed special tool 2 351 398 into the door and apply to nut (1) and guide (2).

      Slacken nut (1) with knob (3).

      Turn lever (4) to adjust preload and tighten nut (1).

      Tightening torque 51 33 2AZ .

      Courtesy of BMW OF NORTH AMERICA, INC.

      Check setting, repeat process if necessary.

      Remove special tool 51 0 341 from rotary striker of door lock.

      After completion of adjusting procedure, INITIALIZE POWER WINDOW REGULATOR .