1999 BMW 525i Workshop Manual

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540 Sunroof
General . . . . . . . . . . . . . . . . . . . . . . . . . . . ,540-2
Sunroof Adjustments. . . . . . . . . . . . . . . .540-2
Sunroof electronic controls, initializing . . . . ,540-2
Sunroof, normalization. . . . . . . . . . . . . . . . . ,540-3
Sunroof, characteristic curve . . . . . . . . . . . .540-3
Sunroof panel, emergency closing . . . . . . . ,540-4
Sunroof, adiustino . . . . . . . . . . . . . . . . . . . . ,540-5
~unroofwitil steel roof panel, adjusting . . . ,540-5
Sunroof with glass roof panel, adjusting . . . ,540-7
Sunroof Components . . . . . . . . . . . . . . 540-8
Sunroof components (glass)
. . . . . . . . . . . . 540-8
Sunroof panel, removing and
installing (steel or glass)
. . . . . . . . . . . . . . . 540-8
Sunroof panel gasket, replacing
(steel or glass)
. . . . . . . . . . . . . . . . . . . . . . . 540-9
Sunroof motor, replacing
. . . . . . . . . . . . . . 540-10

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540-2
Sunroof
This repair group covers the slide-tilt sunroof assembly.
There are two types of sunroof panels available: steel
01
glass. Service procedures are different for each type.
Component locations, initialization, sunroof panel replace-
ment, and sunroof height adjustment are covered. Replace-
ment of the cable assembly or frame require that the
headliner be removed. Removal and repair of the sunroof as-
sembly and othercomponents inside the roof cavity is beyond
the scope of this manual.
When the sunroof is set to the vent position (rear of panel up),
the inside headliner moves rearward approximately
120 mm
(4.7 in) This provides cabin ventilation with less wind noise. A
water channel is incorporated into the sunroof assembly. It
automatically rises when the sunroof panel is in the vent posi-
tion and prevents water from entering the interior during brak-
ing.
Sunroof electronic controls, initializing
- Initialize the sunroof in the following situations:
Malfunctions
such as lack of one-touch function, lack of
comfort openinglclosing or lack of safety (anti-trapping)
features.
If sunroof motor has been removed and reinstalled.
If power supply to the sunroof has been interrupted.
If repairs have been performed on the slideltilt mechanism.
NOTE -
The initialization sequence is dependent on the software ver-
sion of
tlie sunroof module (in the sunroof drive unit).
I WARNING -
I There is no anti-trapping protection during initialization. I

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Sunroof, normalization
During normalization the mechanical end positions of sunroof
movement are detected and stored by the General Module
(GM
Ill).
,:..I:,* *:3F$&-T , a,.,-. . 2 *i;.'I . :i_(,*,,_ _* Press and hold sunroof switch in "lift" direction.
Afler reaching end position
(A), keep switch pressed for
approximately
20 seconds longer.
- Normalization is complete when sunroof in lifl position (A)
moves briefly in direction of (6).
E39 models up to 311 998
- The characteristic curve for E39 models built up to 311998 is
learned automatically during operation. After normalization,
open and close sunroof once by pressing switch.
NOTE-
In the event of a faulty triggering of the anti-trap protection in
a specific position, the fault can be rectified
by moving over
the relevant position several times.
E39 models from 311 998
- Characteristic curve is learned manually in the following
steps:
Release switch after normalization for maximum of
5 sec-
onds.
Then hold down switch in sunroof raising position until sun-
roof has returned to closed position after a complete open-
ing operation.
Characteristic curve learning is complete, release sunroof
switch.
NOTE-
Carry out function check (tip function, anti-trap protection
and, if necessary, comfort function).

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-.
Sunroof
Sunroof panel, emergency closing
4 Using a plastic tool carefully pry interior light out of headliner.
4 Remove access panel from below sunroof motor by inserting
fingers through light opening and pressing down.
4 Disconnect electrical connections (arrow) and lay switch
panel aside.
4 Insert hex ltey into drive in sunroof motor (arrow), and turn
hex ltey to manually close sunroof.
NOTE-
The hex ley for manually (emergency) closing the sunroof
can be found in the tool
Itit located in the trunk lid (sedan
models) or under the cargo area floor panel (Sport Wagon).

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Sunroof, adjusting
The sunroof is controlled by a set of cables that move the sun-
roof panel along guide rails when the motor is operated. The
sunroof can be adjusted without removing it from the car.
NOTE-
Be sure to check drains in front corners of sunroof carrier if
water is entering car through headliner.
- The sunroof panel should be adjusted under the following cir-
cumstances:
Sunroof misaligned with roof.
Sunroof does not close squarely.
* Wind noise at high speeds (sunroof closed).
Sunroof has been removed.
For correct sunroof alignment:
Sunroof must be fully closed.
Gap must be even all around edge of sunroof.
Front of sunroof must be flush to
1 mm (0.04 in.) below sur-
face of roof.
. Rear of sunroof must be flush to 1 mm (0.04) above sur-
face of roof.
NOTE-
Use a credit card to measure the gap. The card sllould insert
through the gap with equal resistance all around the perimeter.
Sunroof with steel roof panel, adjusting
- The headliner panel must be disengaged from the drive as-
sembly and moved rearward in order to access the roof panel
attaching screws.
CAUTIOI\C
Sunroof panel must never be moved to open position when . .
I the headliner is disenaaaed. 1
- Start with a fully closed roof panel.
- Remove drive motor access cover. See Sunroof motor, re-
placing.
Using hex key from tool kit, turn motor drive 90" counter-
clockwise.
Rear of sunroof panel will drop
2 to 3 mm (0.08 to 0.12 in).
This disengages headliner from sunroof panel.
- Push headliner panel rearward, exposing roof panel attach-
ing screws.

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l Sunroof
4 Adjusting rear roof height:
Remove fasteners
(A) and (6)
Slide in left and right side adjusting wedges (C) until ideal
setting is reached.
Press sunroof panel forward and tighten wedge nuts
(6).
* Tighten center nut (A).
4 Adjusting front roof height.
Loosen lefl and right fasteners
(A)
Set front of sunroof to ideal height by moving panel up or
down.
Tighten fasteners
(A).
Insert hex key in drive motor and turn 90" clockwise.
Pull headliner panel forward until it locks in place.
Tightening torque
Wedge locking nuts 1.5 Nm (1 3 in-lb)

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Sunroof
Sunroof with glass roof panel, adjusting - -
< Slide sunroof liner back into roof cavity until approx. 70 mm
(2.75 in) is exposed.
Raise glass sunroof panel to vent position to expose rubber
gaiter (arrow).
- Working from center section of gaiter (arrow), carefully pull
gaiter off slotted mounting on sunroof glass panel.
CA UTIOW-
The gaiters tear easik
* Do not attempt to remove gaiters from lower edge of
sliding mechanism.
- With gaiters removed, three adjusting screws are visible at
front and rear of panel.
4 Sunroof panel is retained by three Torx screws (arrows) on
each side. To adjust sunroof height:
Loosen Torx screws until sunroof can just be moved.
- Push sunroof panel forward.
Push sunroof panel up or down until correct height is
achieved.
Reinstall sunroof gaiter.
Sunroof height adjustment specifications
Rear
Flush1 1 rnrn (0.04 in) higher than roof top
Front Flush
11 rnrn (0.04 in) lower than roof top
Tightening torque Sunroof panel to roof (Torx)
6 Nrn (4.4 in-lb)

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1 Sunroof
Sunroof assembly removal and installation involves headliner
removal, and is not covered in this manual. After sunroof re-
pairs, be sure to follow initialization and adjustment proce-
dures given earlier.
I Sunroof comDonents
1. Left rubber boot suppori
2. Left upper control rail
3. Left side water channel repair ltit
4. Left lower control rail
5. Left cover
6. Left side slider
7. Cross member
8. Sunroof frame
9. Trim panel
10. Gasket
11. Glass roof cover
m5sm.7 - -.
Sunroof panel, removing and installing
(steel or glass)
4 To remove sunroof panel, open sunroof and remove wind
blocker
by removing Tom screw (arrow) on each side.