2000 BMW 540I SEDAN Owners Manual

89n
RepairsIndexOverview Controls Car care Technology Data
Onboard computerCancel displayIf the button in the turn-signal lever is
pressed briefly while the average speed
is displayed, the onboard computer dis-
play can be masked out.To restart calculationsIf you continue to press the button in
the turn signal lever, the average values
which were just displayed for fuel con-
sumption and speed will be recalcu-
lated from that point (the engine must
be running for this).
Onboard computer with
alphanumeric display
*
If your vehicle has Check Control with
alphanumeric display, the system's on-
board computer is described in the
"Radio and information systems"
Owner's Manual.

90n
The PDC assists you when you are
parking. A signal warns you of the real
distance to an obstacle. To do this, four
ultrasonic sensors in the rear bumper
measure the distance from the nearest
object. The monitoring range for the
two corner sensors ends approx. 2 feet
(60 cm) beyond the respective bumper.
The range of the two middle sensors is
approx. 4.9 feet (1.50 meters) outward.
The system starts to operate automati-
cally about one second after you select
reverse with the ignition key in posi-
tion 2. It is similarly deactivated when
you engage reverse gear or move the
selector lever position from the "R" po-
sition.
Acoustical signalsThe distance to the nearest object is in-
dicated by a tone sounding at various
intervals. As the distance between vehi-
cle and object decreases, the intervals
between the tones become shorter. A
continuous tone indicates the presence
of an object less than 1 ft. (30 cm)
away.
The warning signal will be canceled af-
ter approx. 3 seconds if the distance to
the obstruction remains constant during
this time (if you are moving parallel to a
wall, for instance).
System malfunctions will be indicated
by a continuous high-pitched tone
when the system is activated the first
time. Please have the cause checked
and corrected by your authorized BMW
center.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).<
Park Distance Control (PDC)
*

91n
RepairsIndexOverview Controls Car care Technology Data
ASC+T/DSC
*
Automatic Stability Control plus
Traction (ASC+T)/Dynamic
Stability Control (DSC)
*
These systems contribute to additional
vehicle stability, especially during ac-
celeration and when cornering.
The DSC system enhances the benefits
of the ASC+T. In addition to optimizing
vehicle stability and traction during ac-
celeration or when starting from a
standstill, a further benefit is realized in
cornering. This, of course, is true only
within physically feasible limits.
The system activates automatically
each time you start the engine.390de359
Indicator lamp
The indicator lamp in the instru-
ment cluster goes out shortly af-
ter you switch on the ignition.
Refer to page 24.
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
>When driving with snow chains.
Refer also to page 131.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. We
therefore urge you to avoid using the
additional safety margin of the system
as an excuse for taking risks.<
For additional details concerning
ASC+T/DSC, please refer to the chap-
ter describing "Advanced technology"
on page 189.

92n
Tire Pressure Control (RDC)
*
The concept RDC 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 system to "learn" the
correct tire inflation pressure, check the
inflation pressure in all tires. Refer to
the table of "Tire inflation pressures"
beginning on page 29 and make any
necessary corrections. Then activate
the system.
This indicator lamp in the in-
strument cluster or 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 yellow indicator lamp in the in-
strument cluster comes on for a few
seconds or the message "SET TIRE
PRESSURE" 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.390de320
Loss of tire pressureIf, after a certain period of time, the air
pressure has gone down significantly
(which is normal for any tire), the yellow
indicator lamp comes on or 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.<

93n
RepairsIndexOverview Controls Car care Technology Data
Tire Pressure Control (RDC)
*
Flat tireIf there is a tire failure with a loss of air
pressure, the red indicator lamp comes
on or the message "TIRE DEFECT" ap-
pears in the Check Control. In addition,
a gong sounds.
If this occurs, reduce vehicle speed im-
mediately and stop the vehicle in a safe
location. Avoid hard brake applications.
Do not oversteer. 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 BMW center has the information
needed for working with RDC and is
equipped with the necessary special
tools.<
System interferenceDuring the period of the malfunction,
the yellow indicator lamp comes on
or the message "TIRE CONTROL
INACTIVE" 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,
additional wheels with RDC
electronics are on board.
Please contact your authorized BMW
center for additional information.

94n
Parking lamps
(side marker lamps)
With the switch in this position,
vehicle lighting is illuminated on
both sides. For lighting on one
side for parking, see page 95.
Low beams/Xenon lamps
*
When the ignition is switched off
and the low beams are on, only
the parking lamps (side marker
lamps) remain on.
390de034
"Follow-me-home lighting:"
If you actuate the headlamp
flasher after you have parked the
vehicle and shut off the engine, the low
beams will remain on for a brief period.
You may also have this function deacti-
vated if you wish.<
Xenon lamps
*
For additional details, refer to page 168."LIGHTS ON" warning In ignition key position 0, a buzzer
sounds for a few seconds after the
driver's door is opened if the head-
lamps have not been switched off
.
On vehicles with alphanumeric Check
Control
*:
The reminder is given through the
Check Control.
Daytime-driving lamp
*
The headlamps are automatically
switched on for daylight driving at
ignition key position 2.
Turn the rotary dial to adjust the illumi-
nation intensity.390de036
Parking lamps/Low beamsInstrument lighting

95n
RepairsIndexOverview Controls Car care Technology Data
High beams/Parking lamps Fog lamps1 High beam
2 Headlamp flasher
(blue indicator lamp)
3 Parking lamps Parking lamp, left or right
*
With the ignition key in position 0, en-
gage the lever in the appropriate turn-
signal position. The lever engages in
the turn signal position.390de335
Front fog lamps
A green indicator lamp 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.
390us037

96n
Interior lamps Reading lampsThe interior lamps operate automati-
cally.Switching interior lamps on
and offPress the button (arrow).
If you want the interior lamps to remain
off at all times, press and hold the but-
ton for approximately 3 seconds.
Press the button briefly to revert to
normal operation.
The luggage compartment lamp in the
sport wagon functions in the same
manner.390de638
Footwell lamps The footwell lamps operate in the same
way as the interior lamps.
The reading lamps are located in the
front near the interior lamp. There are
also reading lamps in the rear. They can
be switched on and off with the switch
(arrow) 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.<
394de301