BMW 750IL SEDAN 1998 Owners Manual

90n
Park Distance Control (PDC)
*
The PDC assists you when you are
parking. Acoustic signals warn you
of the distance to an obstacle. In addi-
tion, four ultrasonic sensors in each the
front and rear bumpers measure the
distance from the nearest object. The
monitoring range for the four front sen-
sors and that of the two rear corner
sensors ends approx. 2 feet (60 cm)
beyond the respective bumper. The two
center sensors cover a distance of
approx. 5 feet (1.50 m).380de619
The system starts to operate automati-
cally about one second after you move
the selector lever to "R" when the igni-
tion key is in position 2. It is similarly
deactivated when you move the selec-
tor lever position from the "R" position.
The indicator lamp in the button (arrow)
comes on to signal the active status.
Manual activation/deactivation is possi-
ble using the button in the center
console (arrow) (indicator lamp comes
on/goes out). The system deactivates
once the vehicle travels approximately
160 ft (50 m) or exceeds a speed of
about 18 mph (30 km/h). It must then be
switched on again as desired.
Acoustical signalsThe distance to an obstruction in the
front is indicated by a higher interval
tone, while the distance to an obstruc-
tion in the rear is indicated by a deeper
tone. As the distance between vehicle
and object decreases, the intervals be-
tween the tones become shorter. A
continuous tone indicates the presence
of an object less than 1 ft. (30 cm)
away.
The warning signal is canceled after ap-
prox. three seconds if the distance to
the obstruction remains constant during
this time (if you are moving parallel to a
wall, for instance).
System malfunctions are indicated by a
short, continuous tone and a flashing
indicator lamp (indicator lamp only
when the system is activated by shifting
the transmission into "R").
Switch the system off and consult an
authorized BMW center to have the
problem corrected.

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RepairsIndexOverview Controls Car care Technology Data
Park Distance Control (PDC)
*
The PDC does not remove the
driver's personal responsibility for
evaluating the distance between the ve-
hicle and any obstacles. Even when
sensors are involved, there is a blind
spot in which objects cannot be de-
tected. This applies especially in those
cases where the system approaches
the physical limits of ultrasonic mea-
surement, as occurs with tow bars and
trailer couplings, and in the vicinity of
thin and painted objects.
Certain sources of sound, such as a
loud radio, could drown the PDC signal
tone.<
Keep the sensors clean and free
of ice or snow in order to ensure
that they continue to operate effectively.
Do not apply high-pressure spray to the
sensors for a prolonged period of time.
Maintain an adequate distance of more
than approx. 4 inches (10 cm).<

92n
ASC+T/DSC
*
Automatic Stability Control plus
Traction (ASC+T)/Dynamic
Stability Control (DSC)
*
These systems help provide additional
dynamic stability, particularly when ac-
celerating and cornering.
The DSC system enhances the benefits
of the ASC+T. In addition to optimizing
vehicle stability and traction when ac-
celerating or starting from a standstill,
another benefit is realized in cornering
stability. Of course, this is subject to the
limits imposed by the laws of physics.
The system activates automatically
each time you start the engine.380de621
Indicator lamp
The indicator light in the instru-
ment cluster goes out shortly af-
ter you switch on the ignition.
Refer to page 21.
Indicator lamp flashes:
The system is actively regulating drive
torque in response to monitored vehicle
operating conditions.
If the indicator lamp fails to go out after
the engine is started, or if it comes on
during normal driving:
If the system has not been deactivated,
there is a system malfunction. The vehi-
cle remains operational, but without
ASC+T/DSC. Consult your authorized
BMW center for repair.
To deactivate the systemPress the button. The indicator lamp
will come on.
Depending on equipment options, the
button is marked with ASC or DSC.
With deactivated ASC+T/DSC you are
driving with conventional, unregulated
torque transfer.
We recommend that you deactivate the
system for increased traction:
>When rocking the vehicle or starting
off in deep snow or on loose surfaces
>or when driving with snow chains.
Refer also to page 129.To reactivate the systemPress the button again; the indicator
lamp goes out.
The laws of physics cannot be re-
pealed, even with ASC+T/DSC.
Any consequences arising from traction
loss due to excessive vehicle speed re-
main the responsibility of the driver. For
this reason, do not take risks, using the
additional safety margin provided by the
system as an excuse.<
For additional details concerning
ASC+T/DSC, please refer to the chap-
ter describing "Advanced technology"
on page 185.

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RepairsIndexOverview Controls Car care Technology Data
Electronic Damper Control (EDC)
*
The system automatically ensures
damping of the running gear on de-
mand and thus increases comfort and
driving safety.Automatic adaptationAutomatic adaptation is activated after
every engine start. It can be maintained
throughout the entire vehicle speed
range and for all load conditions. If op-
erating parameters (road-surface qual-
ity, driving conditions such as steering,
braking, others) change, the damping
system adapts automatically to the new
factors in fractions of a second.380de620
Sport programWith the ignition key in position 2, press
the EDC button (arrow). The indicator
lamp next to the S comes on.
The Sport program should be invoked
when you wish to have strictly perfor-
mance-oriented tuning of the running
gear under all operating conditions.
To switch to automatic adaptation:
Press the button again; the indicator
lamp goes out.

94n
Tire Pressure Control (RDC)
*
The conceptRDC monitors the tire pressures at all
four wheels, even when the vehicle is
moving. The system provides an alert
whenever the inflation pressure drops
significantly below the specified pres-
sure in one or more tires.
In order for the RDC to "learn" the cor-
rect tire inflation pressure, check the in-
flation pressure in all tires. Refer to the
table of "Tire inflation pressures" on
page 26 and make corrections if neces-
sary. Then activate the system.
The Check Control will inform you if the
tire pressure is not correct.
Activate the system1 Turn the ignition key to position 2
(do not start the engine)
2 Press and hold the button (arrow) un-
til the message "SET TIRE PRES-
SURE" appears in the Check Control
3 After you have driven for a few min-
utes, the RDC will import the current
inflation pressure in the tires as the
target values which the system will
monitor.
You will only have to repeat this proce-
dure if the tire inflation pressure must
be corrected. Otherwise, the RDC func-
tions automatically when the ignition
key is in position 2, and thus operates
whenever the vehicle is driven.380de658
Loss of tire pressureIf, after a certain period of time, the air
pressure has gone down significantly
(which is normal for any tire), the mes-
sage "CHECK TIRE PRESSURE" ap-
pears in the Check Control.
This alerts you that you should have the
tires inflated to the specified pressures
as soon as possible.
If you are prompted to check the
tire pressure shortly after a cor-
rection has been made, this indicates
that the corrected values were not ac-
curate. Please check the inflation pres-
sure again and make corrections ac-
cording to the inflation pressure table.<

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RepairsIndexOverview Controls Car care Technology Data
Tire Pressure Control (RDC)
*
Flat tireIf there is a tire failure with a loss of air
pressure, the message "TIRE DEFECT"
appears in the Check Control. In addi-
tion, a gong sounds.
If this occurs, reduce vehicle speed im-
mediately and stop the vehicle. Avoid
hard brake applications. Do not over-
steer. Replace the wheel and flat tire.
The spare tire which is available in
your vehicle as standard equip-
ment is equipped with the electronics
required for RDC and, following activa-
tion of the system, is also monitored af-
ter it is mounted.<
The RDC cannot alert you to se-
vere and sudden tire damage
caused by external factors.<
Have the tires changed by your
authorized BMW center.
Your authorized BMW center has been
trained to work with the RDC system
and is equipped with the necessary
special tools to do so.<
System interferenceUnder certain local conditions, the RDC
may malfunction for brief periods be-
cause of interference from outside sys-
tems or electronic devices which have
the same radio frequency.
During the period of the malfunction,
the message "TIRE CONTROL INAC-
TIVE" appears in the Check Control.
You will also see the same message
>in the event of a system fault
>if a wheel is mounted without the
RDC electronics
>if, in addition to the spare tire, addi-
tional wheels with RDC electronics
are on board.
Please contact your authorized BMW
center for additional information.

96n
Parking lamps/Low beams Instrument panel lightingSide lamps (side marker lamps)
With the switch in this position,
vehicle lighting is illuminated on
both sides. For lighting on one
side while parking, refer to page 97.
Low beams/Xenon lamps
*
When you switch the ignition off
with the low beam headlamps
on, only the side lamps (side
marker lamps) will remain on.
When the low beams are switched on,
the interior door handles are lighted.
The brightness is controlled by the in-
strument panel lighting.
380de034
You can adjust the "Follow-Me-
Home" function: The low beams
will then remain on for a brief period af-
ter you park the vehicle if you actuate
the headlamp flasher.<
Xenon lamps
*
For additional details, refer to page 190."LIGHTS ON" warningIn ignition key position 0, a message
appears in the Check Control after the
driver's door is opened if the head-
lamps have not been switched off
.
Daytime-driving light switch
*
The headlamps are automatically
switched on for daylight driving at igni-
tion key position 2.
Turn the rotary dial to adjust the illumi-
nation intensity.380us036

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RepairsIndexOverview Controls Car care Technology Data
High beams/Parking lampsFog lamps Interior lamps1 High beam
(blue indicator lamp)
2 Headlamp flasher
(blue indicator lamp)
3 Parking lamp
(not released at this time)Parking lamp, left or right
*
With the ignition key in position 0, en-
gage the lever in the appropriate turn-
signal position.380de629
Front fog lamps
A green indicator light appears in
the instrument cluster to indicate
that the front fog lamps are on.
If the high beam is switched on, the fog
lamps go out.
380us037
The interior lamps operate automati-
cally.Switching interior lamps on
and offPress the button (arrow).
If you want the interior lamps to remain
off continuously, maintain pressure on
the button for approximately 3 seconds.
Press the button briefly to revert to nor-
mal operation.
The orientation lamps on the right and
left of the button for interior lamps
come on when the side lamps are
switched on.380us640

98n
Interior lamps Reading lampsFootwell lampsThe footwell lamps operate in the same
way as the interior lamps.
The reading lamps are located in the
front near the interior lamp and in the
rear. They can be switched on and off
with the switch adjacent to each lamp.
In order to conserve the battery,
all of the lamps in the vehicle
are switched off automatically approx.
15 minutes after the ignition key is
turned to position 0.<
380us641

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RepairsIndexOverview Controls Car care Technology Data