brakes BMW 320i SEDAN 2002 E46 Owner's Manual

65n
OverviewControlsMaintenanceRepairsDataIndex
Cruise control
*
To deceleratePress button (Ð) briefly:
If you are already driving with active
cruise control, the speed is decreased
by approx. 0.6 mph (1 km/h) every time
you tap the button.
Press and hold button (Ð):
With the cruise control active, the
system automatically reduces the
throttle opening to slow the vehicle.
When you release the button, the
system registers and maintains the
current speed.
To cancel the cruise controlWhen the system is activated, press the
button. The indicator lamp stays on.
You can use the cruise control again
whenever you want by calling up the
speed that was stored last.
In addition, cruise control is canceled
automatically:
>When the brakes are applied
>When you apply pressure to the
clutch pedal, or when you move the
automatic transmission selector lever
from D to N
>If you exceed or fall below the
programmed speed for an extended
period (by depressing the acceler-
ator, for example).
Recall the stored speedPress button:
The vehicle accelerates to and main-
tains the last speed stored.

72n
Automatic Stability Control plus Traction (ASC+T)

The conceptThis system optimizes vehicle stability
and traction, especially when just
starting off, when accelerating or when
going through curves.
ASC+T recognizes the danger present
in traction loss and will increase driving
stability and traction by reducing the
engine's output, and if necessary, by
applying the brakes to the rear wheels.
ASC+T is ready each time you start the
engine.
Indicator lamp
The indicator lamp in the instru-
ment cluster goes out shortly
after you switch on the ignition,
refer to pages 18, 19.
If the indicator lamp flashes:
ASC+T is actively controlling drive
torque and braking intervention.
If the indicator lamp fails to go out
after the engine is started, or if it
comes on during normal driving:
There is a system malfunction or the
system was deactivated with the
button. Consequently, interventions to
increase driving stability (as described
in the preceding column) are no longer
available. You can still drive the vehicle
perfectly well without ASC+T.
In the event of a fault, please consult
your BMW center, refer to
pages 18, 19.<
To switch off ASC+TPress the button; the indicator lamp
comes on and stays on.
The illustration depicts the arrangement
of the buttons if the vehicle is fully
equipped. This may vary, depending on
the equipment actually installed.
In the following rare situations, it may
prove useful to deactivate the ASC+T
for a brief period:
>When rocking the vehicle or starting
off in deep snow or on loose surfaces
>When driving with snow chains.
To maintain vehicle stability,
always drive with the ASC+T acti-
vated whenever possible.<

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OverviewControlsMaintenanceRepairsDataIndex
Hill Descent Control (HDC)* Ð BMW 325xi, 330xiThe conceptBy reducing the vehicle's speed on
steep downhill stretches, HDC main-
tains predictable vehicle handling
response to provide you with even
greater control of your BMW during
extreme descents.
The vehicle slows to a pace just slightly
faster than walking speed.
HDC is available for activation at
vehicle speeds below approx. 22 mph
(35 km/h). When driving down steep
hills, the vehicle reduces speed auto-
matically down to slightly more than
double walking speed (approx. 8 mph/
12 km/h) and then maintains this speed
at a constant.
You can use the accelerator or brakes
to vary this automatically controlled
speed within a range extending from
approx. 3 mph (5 km/h) to 15 mph
(25 km/h).
In conjunction with the multifunction
steering wheel, you can use the
+/Ð button to set the cruise control to a
target speed in the range from approx.
3 mph (5 km/h) to 15 mph (25 km/h).
HDC is automatically deactivated once
vehicle speed again exceeds approx.
35 mph (60 km/h).
To activate the systemPress the HDC button; the green indi-
cator lamp integrated within the button
comes on.
The indicator lamp flashes whenever
the system is actively intervening to
control your speed with automatic
brake applications.To deactivate the systemPress the button again, the indicator
lamp goes out.
HDC is automatically deactivated once
the vehicle accelerates to more than
35 mph (60 km/h) as well as whenever
you switch off the ignition.
Using HDCVehicles with manual transmission:
You should always ensure that either
reverse or first gear is engaged before
using HDC, as the engine's braking
effect is most pronounced in these
gears, and only reduced engine braking
is available in higher gears.
Vehicles with automatic transmission:
HDC is available for use in all ranges.System malfunctionis signalled by the indicator lamp, which
responds to problems by going out
while HDC is in operation or by failing
to come on when you activate the
system:
HDC has been temporarily deactivated
as a result of high brake temperatures.
If the DSC indicator lamp comes
on at the same time:
Malfunction in HDC and DSC
system. Refer the problem to your
BMW center.

105n
OverviewControlsMaintenanceRepairsDataIndex
Driving notes Antilock Brake System
Brakes: do not drive with your foot
resting on the brake pedal. Even
light but consistent pedal pressure can
lead to high temperatures, brake wear
and possibly even brake failure.
Aquaplaning: when driving on wet or
slushy roads, reduce vehicle speed. If
you do not, a wedge of water may form
between the tires and the road surface.
This phenomenon can lead to partial or
complete loss of contact between the
tires and road surface, vehicle control
and braking ability.
Driving through water: do not drive
through water on the road if it is deeper
than 1 ft (30 cm), and then only at
walking speed. Otherwise, the vehicle's
engine, the electrical systems and the
transmission may be damaged.
Rear tray: never use it to store heavy or
hard objects, as otherwise occupants
could be injured during braking maneu-
vers.
Clothes hooks: when hanging clothing
from the hooks, be sure that they will
not obstruct the driver's vision. Do not
hang heavy objects on the hooks. If you
do so, they could cause personal injury
during braking or evasive maneuvers.<
The conceptThe Antilock Brake System (ABS) keeps
the wheels from locking during braking,
thereby enhancing active driving safety.Braking with ABSIf you are in a situation that requires full
braking, you will exploit the full benefits
of the ABS system if you apply
maximum pedal pressure ("panic stop").
Since the vehicle maintains steering
responsiveness, you can avoid possible
obstacles with a minimum of steering
effort, despite the full brake application.
Pulsation at the brake pedal combined
with sounds from the hydraulic circuits
indicates to the driver that ABS is in its
active mode.

106n
Brake systemBrake fluid level If the brake fluid level is too low and
brake pedal travel has become longer,
there may be a defect in one of the
brake system's hydraulic circuits.
Proceed to the nearest BMW
center. It may be necessary to
apply higher levels of pressure to the
pedal when stopping and braking
distances may also be longer. Please
remember to adapt your driving style
accordingly. with the vehicle parked or in storage,
and operating conditions in which
braking is restricted to gentle, low-
pressure applications will all increase
the tendency for corrosion to form on
the rotors; this is often accompanied by
a simultaneous accumulation of
contamination on the brake pads. The
pads must exert a certain minimal level
of pressure against the rotors for the
disc brakes' inherent self-cleaning
effect to remain effective; the pressure
available under the above conditions
may not provide adequate cleansing.
If the brake rotors are corroded, they
will tend to respond to braking with a
pulsating effect that even extended
brake applications will fail to cure.
When driving in heavy rain and on wet
roads it is a good idea to apply light
pressure to the brake pedal every few
miles. Monitor traffic conditions to
ensure that this maneuver does not
pose a hazard to you or to other road
users. The heat generated in this
process helps dry the pads and rotors
to ensure that your brake system will
respond with undiminished efficiency
when you need it.
When descending steep hills and
extended grades, downshift to a gear
that will allow you to continue safely
with only a minimal amount of braking.
By minimizing the loads placed on the
brake system, this strategy helps
ensure that optimal brake system
response will remain available at all
times. Use care to avoid exceeding the
approved engine-speed range, refer to
page 66.Do not coast with the clutch
depressed or with the transmis-
sion in neutral. Do not coast with the
engine shut off. The engine provides no
braking effect when the clutch is
depressed and there is no power-assist
for braking or steering when the engine
is not running.
BMW 325xi, 330xi: always refer all
brake inspection and service work to
your BMW center, as failure to observe
the special procedures could result in
damage to brake system components.
Never allow floor mats, carpets or any
other objects to protrude into the area
around the accelerator, clutch and
brake pedals and obstruct their move-
ment.<
Brake pads
For your own safety: use only
brake pads that the manufacturer
has released for your particular vehicle
model. The manufacturer cannot eval-
uate non-approved brake pads to
determine if they are suited for use, and
therefore cannot ensure the operating
safety of the vehicle if they are
installed.<

Everything from A to ZA
ABS (Antilock Brake
System)19, 105
Accessories10
Activated-charcoal filter91
Adaptive Transmission
Control (ATC)60
ADB (Automatic Differential
Brake)73
Adding
brake fluid118
coolant117
engine oil115
washer fluid114
Adjusting
head restraints44
lumbar support43
manual seats42
mirrors48
power seat43
steering wheel47
thigh support42
Air conditioning85
temperature settings86
Air distribution86, 89
Air nozzles85 Air outlets,
ventilation85, 88
Air supply86, 89
Airbags18, 49
sitting correctly41
Alarm system36
Antifreeze117
Antilock Brake System
(ABS)19, 105
Anti-theft system36
Aquaplaning104, 105
Armrest92
ASC+T (Automatic Stability
Control plus Traction)72
Ashtray
front95
rear95
ATC (Adaptive Transmission
Control)60
Attach vehicle vacuum
cleaner95
AUC (Automatic recircu-
lated-air control)90
Automatic climate
control88
temperature settings89
Automatic cruise control64
Automatic curb monitor47 Automatic Differential Brake
(ADB)73
Automatic headlight
control82
Automatic recirculated-air
control (AUC)90
Automatic Stability Control
plus Traction (ASC+T)72
Automatic transmission59
Automatic transmission with
Steptronic18, 59
Automatic-dimming feature,
mirrors49
Average consumption70
Average speed70
Axle loads142
B
Backrest, adjusting42
Backup lamps58
bulb replacement127
Battery133
care133
charge current
indicator17
charging133
Belts, safety45
Beverage holder93 Blower86, 89
BMW High Performance
Synthetic Oil116
BMW Maintenance
System119
BMW sports seat
electrical adjustment43
manual adjustment42
Bore140
Bottle holder, refer to
beverage holder93
Brake fluid118
add118
warning lamp17
Brake lamps
bulb replacement127
Brake system104, 106
brake fluid118
brake fluid level106
brake pads106
brake pads, indicator
lamp19
disc brakes106
Break-in procedure104
Bulbs and lamps,
replacement124

A-Z