BMW 750IL SEDAN 1998 Service Manual

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Alarm systemThe vehicle alarm system responds:
>When a door, the hood or the lug-
gage compartment lid is opened
>To movement inside the vehicle (inte-
rior motion sensor)
>To variations in the vehicle tilt sensor
such as occur during attempts to
steal the wheels or tow the vehicle
>To interruption of battery voltage.
The system responds to unauthorized
vehicle entry and attempted theft by si-
multaneously activating the following:
>Sounding an acoustical alarm for
30 seconds
>The hazard warning flashers are acti-
vated for approx. five minutes
>The high beams flash on and off in
the same rhythm.
To arm and disarm the alarm
systemWhen the vehicle is locked or unlocked
by using a key or with the remote con-
trol, the alarm system is also simulta-
neously armed or disarmed.
The interior motion sensor is activated
approx. 30 seconds after you have fin-
ished locking the car.
The system indicates that it has been
correctly armed by switching on the
hazard flashers for a single cycle and by
emitting an acoustical signal.
When the system is active, you can still
gain access to the luggage compart-
ment by pressing button 3 on the re-
mote control transmitter. When the lid is
closed, it is armed once again.
Indicator lamp displays>The indicator lamp on the top of the
instrument panel flashes continu-
ously: The system is armed
>The indicator lamp flashes during
arming: door(s), the hood or luggage
compartment lid are not completely
closed. Even if you do not close the
alerted area, the system begins to
monitor the remaining areas, and the
indicator lamp flashes continuously
after 10 seconds. However, the inte-
rior motion sensor is not activated
>If the indicator lamp goes out when
the system is disarmed: No unau-
thorized entries have been detected
in the period since the system was
armed380de020

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RepairsIndexOverview Controls Car care Technology Data
Alarm system>If the indicator lamp flashes for
10 seconds when the system is
disarmed: An attempted entry has
been detected in the period since the
system was armed.
Following triggering of an alarm, the in-
dicator lamp will flash continuously.Tilt alarm sensorThe tilt alarm sensor and interior motion
sensor may be switched off at the same
time. By doing this, you can prevent
false alarms on garage ramps or when
the vehicle is transported by trailer or
train, for instance.
Lock the vehicle twice (= arm the sys-
tem). In other words, press button 2 of
the remote control twice in succession
or lock the vehicle twice with the key.
The indicator lamp lights up briefly and
then flashes continuously. The tilt alarm
sensor and the interior motion sensor
are deactivated for as long as the sys-
tem remains armed.
Interior motion sensorThe transmitter and receiver of the inte-
rior motion sensor are located in a trim
panel in the vehicle's headliner.
In order for the interior motion sensor to
function properly, the windows and
sliding/tilt sunroof must be completely
closed.
Nevertheless, you should deactivate the
interior motion sensor whenever
>children or animals are left in the
vehicle
>the windows and/or sunroof are left
open.380de628
Emergency deactivation
procedureIf the car is locked and it is not possible
to disarm the system in the normal
manner, proceed as follows:
1 Use the key to unlock the door (the
alarm sounds for 30 seconds when
opening the door)
2 Turn the key to ignition key posi-
tion 1; the central locking system
unlocks the remaining doors.
The alarm system is now disarmed. Re-
fer the problem to your BMW center.

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Electric power windowsOpen and close windowsIn ignition key position 1 or 2:
>Depress the rocker switch until you
feel resistance:
The window continues moving for as
long as you maintain pressure on the
switch
>Press the rocker switch beyond the
resistance point:
The window moves automatically.
Press the switch a second time to
stop the window380us651
After the ignition has been switched off:
>You can continue to operate the
power windows as long as one of the
front doors has not been opened. To
open a window, press the rocker
switch past the resistance point.
Remove the ignition key when you
leave the vehicle and close the
doors so that children can no longer
operate the power windows, possibly
injuring themselves, for instance.<
For the convenience operating mode
via the door lock or the remote control,
refer to page 32 or page 33.Safety featureA contact strip is integrated into each of
the upper window frame sections. If
pressure is exerted against this contact
strip while a window is being raised, the
system will respond by stopping the
window and then retracting it a small
distance.
Despite this safety feature, be ex-
tremely careful that the closing
path of the window is not obstructed
whenever it is closed. Otherwise, an
object might not touch the contact strip
in some situations (with very thin ob-
jects, for instance). You can override
this safety feature by pressing the
switch beyond the resistance point and
holding it.
Because the power windows are sealed
at high pressure to prevent wind noise
when closed, a powerful motor is re-
quired for efficient closing. When clos-
ing the windows, always ensure that
they are not obstructed in any way. Un-
supervised use of these systems can
result in serious personal injury. Re-
move the ignition key to deactivate the
electric power windows whenever you
leave the car. Never leave the keys in
the car with unsupervised children.
Never place anything that could ob-
struct the driver's vision on or next to
the windows.<

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RepairsIndexOverview Controls Car care Technology Data
Electric power windows Security glass
*
Safety switchYou can use the safety switch (arrow) to
deactivate the rear window switches
(when children are riding in the rear
seats, for instance).
Press the safety switch whenever
children are riding in the rear of
the vehicle. Careless use of the power
windows can lead to injury.< 380us055
Break-resistant security glassThe glass installed on all side windows
and the rear window is designed to of-
fer resistance to breakage and vandal-
ism. Each break-resistant window con-
tains several layers of clear synthetic
plastic film sandwiched between the in-
ner and outer glass panes. In addition,
another film is applied to the inner sur-
face of the glass (facing the passenger
compartment). This film prevents the
glass, if shattered, from spreading into
the passenger compartment.
Please note the following precautions
regarding this inner glass surface film:
1 The film is not scratch-resistant.
Avoid contact with sharp objects
which may break through or cut the
film
2 Clean the glass with water. If ineffec-
tive, you may use regular household
window cleaner; wipe the cleaner off
immediately.
Do not use window cleaners contain-
ing solvents or abrasives, as these
may scratch the film3 Do not apply any self-adhesive la-
bels, or labels with tape to the inner
surface
4 Do not apply window tint film to the
inner window surface
5 If frost or ice builds up on the inner
surface in cold, high-humidity cli-
mates, do not use a scraper or an
"ice-removing spray." Start the en-
gine and refer to the instructions on
defrosting the door windows.

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Sliding/Tilt sunroof
To prevent injuries, exercise care
when closing the sliding/tilt sun-
roof and keep it in your field of vision
until it is shut.
Before leaving the car, switch off the
electric sunroof mechanism by taking
out the ignition key. Do not leave
children unattended in the vehicle with
access to vehicle keys. Use of the key
can result in starting of the engine and
operation of vehicle systems such as
power sunroof, etc. Unsupervised use
of these systems can result in serious
personal injury.<
To avoid pressure or drafts in the pas-
senger compartment when the sunroof
is open or lifted, keep the air vents in
the dashboard open and increase
the air supply if necessary. Refer to
pages 100, 104.
For the convenience operating mode
via the door lock or the radio remote
control, refer to page 32 or page 33.
Safety featureIf the sliding/tilt sunroof encounters re-
sistance at a point roughly past the
middle of its travel when it is closing,
the closing cycle is interrupted and the
sunroof will open again slightly.
Despite this safety feature, be ex-
tremely careful that the closing
path of the sunroof is not obstructed
whenever it is closed. Otherwise, trig-
gering the closing-force limitation may
not be ensured in some situations (with
very thin objects, for instance). You can
override this safety feature by pressing
the switch beyond the resistance point
and holding it.<
Lifting – opening – closingFrom ignition key position 1 press the
switch or slide it to the desired direction
until you feel resistance.
When lifting, the headliner retracts sev-
eral inches.
You can continue to operate the sun-
roof after the ignition has been
switched off as long as one of the front
doors has not been opened.380de615

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RepairsIndexOverview Controls Car care Technology Data
Sliding/Tilt sunroofAutomatic
* opening and closing
Press the switch past the resistance
point briefly: The sunroof travels to ei-
ther the fully-closed or fully-open posi-
tion.
Other automatic operations are:
>With the sunroof open, press the
switch briefly toward "Lift:"
The sunroof automatically extends to
its fully raised position
>With the sunroof lifted, press the
switch briefly toward "Open:" The
sunroof automatically opens all the
way.
Pressing the switch again briefly stops
the motion immediately.
Sliding/Tilt sunroof with glass
moonroof
*
The options and control procedures are
essentially the same as those previ-
ously described for the sliding/tilt sun-
roof. In order to open the raised roof,
press the control switch towards
"Open" until the roof has reached the
desired position.
The headliner insert slides back some-
what when you raise the roof. When the
roof is opened, the headliner retracts
with it. The headliner will then automati-
cally remain in its retracted position, but
can be repositioned as desired.
Power loss or malfunctionAfter interruptions in electrical supply
(when the battery is disconnected, for
instance), the sunroof will only lift. To
reinitialize the mechanism:
1 Raise the sliding/tilt sunroof all the
way
2 Continue to hold the switch for
approx. five seconds.
In the event of an electrical system mal-
function, the sliding/tilt sunroof can be
manually operated. Refer to page 178.380de616

46n
Seat adjustment Electric power seatsFor maximum safety when adjusting the
seat position, please observe the fol-
lowing:
Never try to adjust your seat while
operating the vehicle. The seat
could respond with unexpected move-
ment, and the ensuing loss of vehicle
control could lead to an accident.
Wear the safety belt firmly against your
body at all times. In the event of a fron-
tal impact, a loose lap belt could slide
over your hips, leading to abdominal in-
jury. In addition, the safety belt's re-
straint effectiveness is reduced if the
belt is worn loosely.
Never ride with the backrest reclined to
an extreme horizontal angle (especially
important for front passengers to re-
member). Keep the backrest relatively
upright to minimize the risk of "sliding
under" the safety belt and sustaining in-
jury in an accident.
Do not slide the seats to the rear when
the vehicle is at an extreme angle (on
garage ramps or steep slopes, for in-
stance), to prevent the shoulder strap's
automatic height adjustment mecha-
nism from disengaging.<
1 Tilt angle
2 Forward - backward adjustment
3 Cushion height
4 Backrest angle
5 Head restraint height
Adjust the head restraint manually by
tilting it in the desired direction.
Head restraints reduce the risk of
spinal injury in the event of an ac-
cident.
Adjust the head restraint so that its cen-
ter is approximately at the height of the
ear.
For maximum safety, read carefully and
comply with the adjustment instructions
presented here.< 380de023
Correct sitting postureTo reduce strain on the spinal column,
sit all the way back in the seat and rest
your back fully against the backrest.
Ideal sitting posture is achieved with
your head extending from your spine in
a straight line.
For long-distance driving, you may wish
to increase the backrest tilt-angle
slightly to reduce muscular tension.
Please remember that you should al-
ways remain able to grasp the entire
periphery of the steering wheel without
straightening your arms.Lumbar supportRefer to the BMW comfort seat in the
following column.

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RepairsIndexOverview Controls Car care Technology Data
BMW comfort seat
*
This seat allows you to make additional
adjustments for
1 Lumbar support
2 Shoulder supportLumbar supportYou can adjust the backrest's contour
for additional support in the curvature
of your spine's lumbar region.
The upper hips and spinal column re-
ceive supplementary support to help
you maintain a relaxed, upright posture.
>Press front/rear of switch:
Increase/decrease curvature.
>Press the upper/lower end of the
switch:
Increase the upper/lower curvature.380de024
Shoulder supportPress the rocker switch: The support
angle of the upper backrest section is
adjusted.
You can use the adjustable upper back-
rest for supplementary support in the
shoulder region. This provides a relaxed
driving position and helps relieve stress
on the shoulder muscles.
To obtain an optimal seating posture,
we recommend:
Driver's side and front passenger's
side:
1 Adjust the upper backrest section
to its extreme rear position
2 Adjust to the optimal seat position as
described on page 46
3 Bring the upper backrest section for-
ward until your shoulders enjoy firm
support.380de064
Front passenger's seat adjusted for re-
laxed traveling:
1 Adjust the upper backrest section to
its extreme rear position
2 Increase the seat cushion tilt
3 Tilt the backrest more
4 Bring the upper backrest section
forward.
Make corrections in the forward-
backward adjustment of the seat
to ensure that the safety belt still fits
firmly against your body. If you do not
do this, the protection provided by the
safety belt may be reduced.<
When you are adjusting the seat, select
a position in which you remain as far
from the instrument panel as possible.

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BMW contour seat
* BMW active seat
* Rear power seat
*
In addition to the adjustments offered
by the electric power seat, there are ad-
justments for thigh support, shoulder
support and lumbar support.Thigh supportPress the switch (arrow) to make ad-
justments.Shoulder supportRefer to BMW comfort seat on the pre-
vious page.Lumbar supportRefer to BMW comfort seat on page 47.380de066
Actively changing the surface of the
seat helps to prevent muscle tension,
back pain in the lumbar region, and
symptoms of fatigue.
To activate this feature, press the but-
ton (arrow).
For more details, please refer to the
section headed "Advanced technol-
ogy" on page 186.380de627
1 Backrest angle
2 Head restraint height
3 Lumbar support
The head restraint extends automati-
cally whenever a passenger fastens the
safety belt at one of the rear seating po-
sitions.
Correct head restraint height with
switch 2.
For information on the lumbar support,
refer to the BMW comfort seat on
page 47.380de025

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RepairsIndexOverview Controls Car care Technology Data
Adjusting the steering wheelThe steering wheel can be moved in
any of four directions. Adjust by moving
the control lever in the desired direc-
tion.
Do not adjust the steering wheel
while the vehicle is moving. There
is a risk of accident from unexpected
movement.<
To store the steering wheel setting, re-
fer to "Seat, mirror and steering wheel
memory" on page 51.380de028
Electric steering wheel
adjustmentIn order to make it easier to get into and
out of the car, the steering wheel auto-
matically moves into the top position
and returns to the driving (memory) po-
sition.
This automatic feature is controlled by
the position of the ignition key and by
the driver's door.
You can make the settings of your
vehicle in such a manner that,
when you unlock the car with your per-
sonalized remote control, your own per-
sonalized steering wheel adjustment is
initiated.<