brakes BMW 325Ci COUPE 2001 E46 User Guide

175n
IndexDataTechnologyRepairsCar careControlsOverview
Deceleration sensors continuously
monitor the acceleration forces acting
upon the vehicle. If, as the result of a
frontal collision, a deceleration is
reached at which the protection of the
safety belts alone is no longer
adequate, the gas generators of the
driver and passenger-front airbags are
ignited. However, the passenger-side
airbag is only triggered if an additional
sensor has recognized that the
passenger seat is occupied.
In the event of a side collision, the head
and side airbags in the front or rear
* are
triggered if necessary.
390de319
The airbags located under the marked
covers inflate and unfold in a matter of
a few milliseconds. In this process, they
tear through the designed separation
points of the upholstered covers or
press them out.
Because the inflation process must be
virtually instantaneous, it is accompa-
nied by a certain amount of ignition and
inflation noise, which will be drowned
out by the noise from the accident
itself. The gas required to inflate the
airbags is not dangerous, and the
associated smoke then dissipates.
The entire process is completed within
fractions of a second.Highly sensitive sensors monitor the
number of revolutions of the wheels.
When equipped with DSC, they also
monitor steering angle, lateral accelera-
tion, brake pressure and the movement
of the vehicle around its vertical axis.
If differences in the wheel speeds
occur, ASC+T counteracts the danger
of wheelspin by reducing engine
torque; if necessary, ASC+T will also
respond by applying the brakes to the
rear wheels.
In addition, DSC permanently monitors
the vehicle's current operating condi-
tion and compares it with an ideal
condition that is calculated from the
sensor's signals. If deviations from this
occur (understeering or oversteering,
for instance), DSC can stabilize the
vehicle in fractions of a second by
reducing engine output and with the
assistance of braking intervention at
individual wheels. As a result,
dangerous skids can be prevented even
as they are just beginning. But this is
only possible within the laws of physics.
You may need some time to become
accustomed to this system's interven-
tion. However, it provides optimum
drive force and vehicle stability.
The braking intervention may be
accompanied by sounds specific to
the system.
Airbags ASC+T/DSC
*

Everything from A to ZA
ABS (Antilock Brake
System)22,115
ABS, fault116
Accessories6
Activated-charcoal
filter100,166
Adaptive Transmission
Control (ATC)67,174
Adding
engine oil135
washer fluid134,187
Adjusting
backrest48
head restraints48
lumbar support49
steering wheel52
temperature92,98
Air conditioner90
Air distribution92,98
Air nozzles90,96
Air outlets90,96
ventilation90,96
Air pressure122
Air supply92,99
Airbags21,57,146,175
sitting properly58
Alarm system42
Antenna121
Diversity176
Antifreeze137
radiator119 Antilock Brake System
(ABS)22,115
Anti-theft alarm system42
Approved weight and load
capacities186
Approved wheel and tire
specifications127
Aquaplaning113,122
Armrest102
ASC+T (Automatic Stability
Control plus
Traction)22,82,175
Ashtray
front104
rear105
ATC (Adaptive Transmission
Control)67,174
Attach vacuum cleaner105
AUC (Automatic
recirculated-air
control)99
Automatic car washes141
Automatic climate
control96
remove window
condensation99
Automatic cruise control73
Automatic dimming, interior
rearview mirror53
Automatic recirculated-air
control (AUC)99 Automatic Stability Control
plus Traction
(ASC+T)22,82,175
Automatic transmission with
Steptronic21,67
Automatic windshield
washer71
Average consumption79
Average speed80
Avoiding unwanted
alarm43
Axle loads186
B
Backrest, releasing49
Backup lamps66
bulb replacement155
Battery163,188
capacity188
charge current20
charging165
discharged168
removal and
installation164
Battery safety terminal164
Battery terminal164
Belts55
Blower92,99
BMW High Performance
Synthetic Oil136
BMW Maintenance
System140 BMW sports seat49
Bore184
Brake fluid138
Brake hydraulic system20
Brake lamps, bulb
replacement155
Brake pads22
Brake system118
Brakes117
malfunctions118
Break-in procedures112
Bulb replacement152
Bulbs152
C
California Proposition
65 Warning148
Capacities187
Car Memory54
Car radio121
refer also to the separate
Owner's Manual
Car radio
reception121,176
Car vacuum cleaner105
Car wash141
Care
exterior142
interior144
Care of upholstery145
Care of wool velour145

Everything from A to Z
193n
IndexDataTechnologyRepairsCar careControlsOverview
Cargo
loading108
securing108
Caring for the vehicle's
finish143
Cassette operation, refer to
the Radio Owner's Manual
Catalytic converter113
CBC (Cornering Brake
Control)21,116
CD operation, refer to the
Radio Owner's Manual
Cellular phone104,121
refer also to the separate
Owner's Manual
Center (high-mount) brake
lamp157
Center 3-point-safety belt in
the rear106
Center armrest102
Central locking system34
button38
Changing a wheel159
Changing tires159
Check Control77
Child restraint systems56
Child seat56
Child seat security62
Cigarette lighter105
Cleaning headlamps72
Cleaning windshield71
Clock78 Clock, refer also to the Radio
or Onboard Monitor
Owner's Manual
Clothes hooks105
Cockpit16
Code, refer to the Radio
Owner's Manual
Coin box, cup holder103
Combination switch70
Compression184
Computer77
Computer, refer also to the
Onboard Monitor Owner's
Manual
Configure settings54
Consumption79
Consumption display76
Contents10
Convenience operation
sliding/tilt sunroof34
windows34
Coolant119,137,187
antifreeze119
Coolant temperature
gauge76
Cooling system187
Copyright4
Cornering Brake Control
(CBC)21,116
Cruise control73
Cruising range79
Curb weight186
Current, check indicator20
D
Data
dimensions185
engine184
technical184
weights186
Daytime-driving lamp87
DBC (Dynamic Brake
Control)116
Deep water113
Defroster, rear
window92,100
Defrosting the
windows94,99
Digital clock78
Dimensions185
Dipstick135
Disc brakes117
Displacement184
Display lighting87
Displays18
Distance warning81
Diversity Antenna
system176
Divided rear backrest106
Door key32
Door locks, care119
Doors
emergency operation34
remote control35
unlocking and locking34
DOT Quality Grades123 Draft-free
ventilation93,100
Drive belts188
Driving hints113
Driving in winter119
Driving lamps87
DSC (Dynamic Stability
Control)22,82,175
Dynamic Brake Control
(DBC)116
Dynamic Stability Control
(DSC)22,82,175
E
Electric power seat50
Electric power windows44
Electrical accessories,
failure166
Electrical system188
Electronic vehicle
immobilizer33
Elements of operation16
Emergency operation
doors34
fuel filler door167
slidling/tilt sunrrof167
Energy Control75
Engine compartment132
Engine coolant137,187
Engine data184

Owner service procedures
199n
IndexDataTechnologyRepairsCar careControlsOverview
A
Adding brake fluid138
Adding engine coolant138
Adding engine oil135
Avoiding unintentional
alarm43 B
Backup lamps, bulb
replacement155
Battery
add distilled water163
charging165
Brake fluid, adding138
Brake lamps, bulb
replacement155
Brakes, brake faults118 C
Changing the
microfilter12,151,166
Changing tires159
Checking air pressure27
Checking engine oil
level135 D
Defrost setting94
Defrosting the
windows94,99 Difficult steering121
Doors, emergency
actuation34
E
Electrical accessories,
failure166
Electrical failure
fuel filler door167
sliding/tilt sunroof167
Emergency closing
sliding/tilt sunroof167
Emergency release
doors34
fuel filler door167
luggage compartment
lid39
Engine coolant, adding138
Engine oil
add135
level135
quality136
specifications136
viscosity136
Eyelets, towing169 F
First-aid kit25
Fittings, towing and tow
starting169
Flat tire159 Footwell lamps, bulb
replacement158
Front fog lamps, bulb
replacement155
Fuel filler door, manual
release after electrical
fault167
Fuses, replacing166
G
Glove compartment lamp,
bulb replacement158 H
Hazard warning flashers25
Hazard warning triangle25
Headlamp cover, care153
High beam headlamps, bulb
replacement153
Hood release130 I
Indicator lamps20
Inflation pressures27,122
Interior lamps, bulb
replacement157
J
Jack159 L
LATCH attachment of the
child seat60
License plate lamp, bulb
replacement157
Low beam headlamps, bulb
replacement153
Luggage compartment
lamps, bulb
replacement158
Luggage compartment lid
emergency release39 M
Maintenance140
Microfilter,
changing12,151,166 O
Oil
level135
quality136
specifications136
viscosity136
Onboard tool kit152