54 12 129 Replacing arm (positioner) for sunroof lid: Installation:

Before installing guide components, apply light coat of Renax GL1 (Fuchs) grease to guide duct. Removing sunroof lid, see 54 12 100 REMOVING AND INSTALLING SUN ROOF LID

Unfasten left/right screws and remove covers (1).

Fig 1: Unfastening Left/Right Screws

IMPORTANT: Sliding/tilting sunroof cassette with a damaged thread must be replaced.

Tightening torque, refer to 54 12 1AZ 54 12 MECHANICAL SUN ROOF COMPONENTS .

Run sunroof mechanism in stages (carefully) up to installation aperture and remove slide (1) on left/right from guide duct. If applicable, run back using the emergency operator.

Fig 2: Removing Slide On Left/Right From Guide Duct

Unfasten left/right retainers. Disconnect left/right linkages.

Fig 3: Unfastening Left/Right Retainers

Slide mechanism right forwards until slides locate in installation aperture. Lift sliding sections on left/right upwards to remove.

Fig 4: Lifting Sliding Sections On Left/Right Upwards To Remove

Twist slide upwards.
Pull sliding section upwards by lever to remove.

Fig 5: Pulling Sliding Section Upwards By Lever

Run mechanism forwards. Push back cross member. Press down on retainer and pull out cross member completely.

Fig 6: Pulling Out Cross Member

Continue to run mechanism forwards until lever (arm) is in installation aperture and can be lifted out.

Fig 7: Lifting Sliding Mechanism Out Using Lever Arm