2001 BMW 325Ci CONVERTIBLE Owner's Manual

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IndexDataTechnologyRepairsCar careControlsOverview
ASC+T DSC*Reactivating ASC+TPress the button again; the indicator
lamp goes out.
The laws of physics cannot be
repealed, even with ASC+T. It will
always be the driver's responsibility to
drive in a manner that matches road
conditions. This is why you should not
use the additional safety margin the
system provides as an excuse to take
risks.<
For additional details concerning
ASC+T, please refer to the chapter
"Advanced Technology" on page 189.
The conceptDSC maintains vehicle stability, even in
critical driving situations.
The system optimizes vehicle stability
during acceleration and when starting
from a full stop, as well as optimizing
traction. In addition, it recognizes
unstable vehicle conditions, such as
understeering or oversteering, and, as
far as is possible within the laws of
physics, helps keeping the car on a
steady course by reducing the RPMs
and brake applications to the individual
wheels.
The DSC is operational every time you
start the engine. DSC includes the
functions of ADB and CBC, refer to
page 123.
The ADB (Automatic Differential
Braking) copies the function of conven-
tional differential and transverse lock
through brake intervention, and
increases traction whenever conditions
merit, e. g. when driving on snow-
covered roads.
If the DSC is switched off the ADB will
still be in ready mode.
Indicator lamp
The indicator lamp in the instru-
ment cluster goes out shortly
after you switch on the ignition.
Refer to page 21, 22.
Indicator lamp flashes:
DSC controls the drive and braking
forces.
The indicator lamp stays lit:
DSC has been switched off via the
button; ADB is operational.
ADB control intervention is not indi-
cated.
The indicator and the brake
warning lamps will remain on
the continuously:
The DSC, ADB and DBC have
been switched off via the button
or are defective.
The vehicle will remain completely
operational, however, without DSC. In
the event of a fault, please see your
BMW center. Refer to page 21, 22.
Indicator and warning lamps for
Canadian models.

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DSC*Switch DSC off/activate ADBPress the DSC button briefly; the indi-
cator lamp comes on and stays on.
DSC has been switched; ADB is opera-
tional.
In the following exceptional circum-
stances, it may be effective to deacti-
vate the ADB for a short period:
>When rocking the vehicle or starting
off in deep snow or on loose
surfaces.
>When driving on snow-covered
grades, in deep snow, or on a snow-
covered surface that has been
packed down from being driven on
>When driving with snow chains.
Refer also to page 128.
The gain in traction is achieved by a
reduction in stabilizing intervention.46cus045
Switch DSC and ADB off>Hold the DSC switch down for at
least 3 seconds. The indicator lamp
and the yellow brake warning lamps
will remain on continuously.
In this case, no interventions to
increase stability and traction for engine
and brakes are carried out.
To maintain vehicle stability,
always drive with DSC switched
on as often as possible.<
Switch DSC and ADB on againPress the button again; the indicator
lamp or the indicator lamps will go out.
The laws of physics cannot be
repealed, even with DSC. It will
always be the driver's responsibility to
drive in a manner that matches road
conditions. We therefore urge you to
avoid using the additional safety margin
of the system as an excuse for taking
risks.
The DSC will not carry out any stabi-
lizing intervention when the ADB is in
ready mode.
Do not make any modifications to the
DSC system. Allow only authorized
technicians to perform service proce-
dures on the DSC.<
For additional details concerning DSC,
please refer to the chapter "Advanced
technology" on page 189.

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IndexDataTechnologyRepairsCar careControlsOverview
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 system to "learn" the
correct tire inflation pressure, check the
inflation pressure in all tires according
to the inflation pressure table (page 28)
and make corrections if necessary.
Then activate the system.
This indicator lamp in the instru-
ment cluster will inform you if
the tire pressure is not correct.
Activate the systemDepending on the type of equipment,
the switch either has the letters RDC on
it or the RDC-symbol.
1 Turn ignition key to position 2 (do not
start the engine).
2 Press the switch long enough for the
yellow indicator lamp in the instru-
ment cluster to light up for a few
seconds.
3 After a few minutes driving time, RDC
sets the current inflation pressure in
the tires as the target values to be
monitored.
You will only have to repeat this proce-
dure following a correction of the tire
inflation pressure. Otherwise, RDC
functions automatically when the igni-
tion key is in position 2, and thus oper-
ates whenever the vehicle is driven.46cus046
In the event of loss in tire
pressureIf the inflation pressure has dropped
significantly over a long period of time
(which is normal for any tire), the indi-
cator lamp will come on with a yellow
lamp.
This alerts you to have the tires inflated
to the specified pressures as soon as
possible.
If you are prompted to check the
tire pressure shortly after a
correction has been made, this indi-
cates that the corrected values were
not accurate. Please check the inflation
pressure again and make corrections
according to the inflation pressure
table. Then activate the system once
again.<

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Tire Pressure Control (RDC)
*
In the event of a flat tireIf there is a tire failure with loss of pres-
sure, the indicator lamp comes on with
a red lamp. In addition, an acoustic
signal is sounded.
If this occurs, reduce vehicle speed
immediately to stop the vehicle in a safe
location. Avoid hard brake applications.
Do not oversteer. Replace the wheel
and flat tire.
The space-saver spare tire is
provided for temporary use only in
the event of a flat tire. It does not have
RDC electronics and is not monitored.<
RDC cannot alert you to severe
and sudden tire damage caused
by external factors.<
Have the tires changed by your
BMW center.
Your BMW center has been trained to
work with the RDC system and is
equipped with the necessary special
tools.<
System interferenceLocal devices using the same radio
frequency can interfere with the RDC.
The yellow indicator lamp will come on
during the malfunction.
The indicator lamp also comes on
>in the event of a system fault.
>if a wheel is mounted without RDC
electronics.
>if additional wheels with RDC elec-
tronics are on board.
Please contact your BMW center for
additional information.

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IndexDataTechnologyRepairsCar careControlsOverview
Side lamps
With the switch in this position,
the front, rear and side vehicle
lighting is switched on.
For lighting on one side for parking as
an additional feature, see page 94.
Low beam headlamps
When you switch the ignition off
with the low beam headlamps
on, only the side lamps will
remain on.
"Follow-me-home" lamps:
If you activate the headlamp
flasher after parking the vehicle, the
low-beam headlamps will come on for a
short time. You can also have this func-
tion deactivated.<
460us035
"LIGHTS ON" warningWhen you open the driver's door after
turning the ignition key to position 0,
a buzzer sounds for a few seconds to
remind you that the headlamps have
not been switched off.Daytime running lamps
*
If you desire, the light switch can be left
in the second position:
When the ignition is switched off, the
external lighting is also switched off.
Turn the rotary dial to adjust the
illumination intensity.
460us036
Side lamps/Low beams
Instrument panel lighting

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High beams/Parking lamps
Fog lamps

Interior lamps
1 High beams (blue indicator lamp)
2 Headlamp flasher (blue indicator
lamp)
3 Parking lampsParking lamp, left or rightAs an additional feature, you can illumi-
nate your vehicle on either side for
parking, if you wish to do so:
With the ignition key in position 0, push
the lever in the appropriate direction.
The lever engages in the turn signal
position.46cde094
Fog lamps
A green indicator lamp appears
in the instrument cluster to
indicate that the fog lamps are
on.
460us038
The interior lamps operate automati-
cally.To switch the interior lamps on
and off manuallyPress the button briefly.
If you want the interior lamps to remain
off all the time, press and hold the
button for approx. 3 seconds.
To revert to normal operation, press the
button briefly.Footwell lampsThe footwell lamps operate in the same
way as the interior lamps.46cde026

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IndexDataTechnologyRepairsCar careControlsOverview
Interior lampsReading lamps frontThe reading lamps can be switched on
and off by their respective button,
which is next to them.46cde113
Reading lamps rearIn the hardtop, the reading lamps are
located in the rear as well, refer to
page 130 or 172.
The reading lamps can be switched on
and off by their respective button,
which is next to them.460de155
In order to prevent battery
discharge, all of the lamps in the
vehicle are switched off automatically
approx. 15 minutes after the ignition
key has been turned to position 0.<

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462us042Air conditioner