air condition BMW M3 COUPE 2001 E46 Owner's Guide

159n
IndexDataTechnologyRepairsCar careControlsOverview
The limitations inherent to radio recep-
tion in a moving vehicle have been
minimized by a number of innovative
system designs:
The "Radio Data System" (RDS) makes
sure that, for broadcast stations
sending on several frequencies, the
radio automatically tunes to the
frequency with the best reception
quality.
The Diversity Antenna system employs
several FM antennas integrated within
the rear window to provide three sepa-
rate sources for receiving broadcast
waves. An integral processor automati-
cally selects the antenna with the best
FM reception quality at any given time.
The selection of the antenna takes
place within milliseconds, and is there-
fore not noticed by the radio listener. The primary goal in developing the
Dynamic Stability Control (DSC) for the
BMW M3 is to achieve the greatest
amount of safety while at the same time
getting the most pleasure out of perfor-
mance-oriented driving.
Using highly sensitive sensors, the DSC
monitors current operating conditions
for your vehicle as they relate to driving
stability and traction. In addition, wheel
speeds, steering angle, lateral acceler-
ation, brake pressure and vehicle
movement around its vertical axis are
also ascertained and evaluated.
If the DSC detects unstable conditions
on a curve, then the DSC will intervene
in engine management within millisec-
onds, reducing drive torque or, if the
need arises, will individually slow one or
more wheels down to keep the vehicle
on a steady course.
If differences in wheel speed should
occur, the system will recognize the
dangers associated with wheel spin
and will reduce the drive torque; if
necessary, it will do so using brake
intervention at the rear wheels as well.
DSC offers the highest degree of
driving stability and safety not only
when you first start your vehicle, are
driving on straightaways or when
braking, but also when driving through
curves.The safety belt tensioner makes sure
that the belt tightens during a head-on
collision to ensure that occupants
remain firmly positioned in their seats.
A gas-pressure system retracts the
buckle assembly to tension the
shoulder and lap belts within fractions
of a second. This reduces the tendency
to slide under the lap belt. Radio reception DSC Safety belt tensioner

161n
IndexDataTechnologyRepairsCar careControlsOverview
Rain sensor
*
Interior rearview mirror, automatic dimming feature

When the "intermittent wiper" speed
position is selected, the wiper reacts
immediately if water is splashed onto
the windshield from vehicles traveling
ahead, for example. As a result, the rain
sensor contributes to driving safety and
comfort.
The interior rearview mirror with auto-
matic dimming feature reduces blinding
from following traffic by adapting the
intensity of the reflected images to
correspond to levels of light registered
by the unit's sensors. The mirror reverts
to its undimmed setting as soon as the
light source disappears. One lamp
sensor is mounted on the front of the
mirror housing. This sensor is directed
forward. It measures light intensity in the
area ahead of the vehicle. The second
sensor is integrated within the mirror's
glass. The electronic control system
compares the light intensity from front
and rear. The difference provides the
basic parameter used to modulate an
electrical current and induce chemical
changes in a semisolid layer incorpo-
rated in the mirror glass.
The semisolid reacts chemically to this
electrical current, thus providing infi-
nitely-variable dimming of the mirror
(electrochromic technology).
As a result, it is no longer necessary to
dim the mirror manually, and the driver
can concentrate completely on traffic
conditions.

163n
IndexDataTechnologyRepairsCar careControlsOverview
Xenon lamps
*
The xenon lamp provides forward illu-
mination with significantly more bright-
ness and uniformity than the traditional
halogen lamp.
In a xenon lamp, an electric arc
replaces the filament in order to
generate intense illumination. A gas
mixture in a quartz glass tube with
metal vapor is ignited by a high electric
voltage. The arc that is generated is
then sustained by a lower voltage.
When the lamp is turned, on there is a
brief warm-up period. Maximum bright-
ness is attained in approx. 15 seconds.
Xenon lamps improve the driver's visi-
bility and orientation to the road, espe-
cially in adverse weather conditions
and driving situations (driving at night in
heavy rain or through road repair areas
where there are no lane markers, for
instance).
Vehicles with xenon lamps are
equipped with automatic headlamp
range control. As a result, the highway
is always optimally lighted, regardless
of load conditions, and drivers in
oncoming traffic are not blinded.
Xenon lamps make a significant contri-
bution to highway safety since other
highway users, bicyclists and motorcy-
clists in the right lane, and pedestrians
are more easily detected.

Everything from A to Z
A
ABS (Antilock Brake System) 21, 104
Accessories 6
Activated-charcoal filter 88
Add brake fluid 121t, 126 t
Adding engine oil 123t
Adding washer fluid 122t
Adjusting the backrest 46
Adjusting the lumbar support 48
Adjusting the seat 47
Adjusting the steering wheel 52
Adjusting the temperature 86
Adjusting the thigh support 47
Adjusting the width of the backrests 48
Air conditioner 87
Air distribution, automatic 86
Air nozzles 84
Air outlets 84
Air pressure, tires 26, 111
Air supply 87
vents, recirculated air
mode 87
Airbags 56, 133 , 158
warning lamps 21Alarm system
40
Alcantara care 132
Antenna 110
Antenna, Diversity 159
Antifreeze 125
radiator 108
Antilock Brake System (ABS) 21, 104
Anti-theft alarm system 40
Anti-theft protection 31
Aquaplaning 103, 111
Armrest 91
Ashtray front 92
rear 93
Attach vacuum cleaner 93
AUC (Automatic recirculated air control) 87
Automatic car washes 128
Automatic climate control 84
Automatic cruise control 67
Automatic dimming, interior rearview mirror 50
Automatic recirculated air control (AUC) 87
Auxiliary terminal for jump- starting 121t
Average consumption 74
Average speed 74Avoiding unwanted
alarm 41
Axle loads 168
B
Backrest
adjusting 45
releasing 47
Backup lamps 64
bulb replacement 141t
Battery 148, 170
add distilled water 149t
capacity 170
charging 150t
current check lamp 20
removal and
installation 150
symbols 149
Belts 54
Beverage holder 91
BMW High Performance Synthetic Oil 124
BMW sports seat 46, 47
Bore 166
Bottle holder, refer to beverage holder 91
Brake hydraulic system 20
Brake lamps, bulb replacement 141t
Brake pads 107
indicator lamp for 21Brakes
driving notes 103
faults 107t
fluid change 71
fluid level 107
warning lamps 20
Break-in procedure 102
C
California Proposition
65 Warning 134
Can holder, refer to beverage holder 91
Capacities 169
Car Memory 52
Car phone 92
Car radio 110
reception 110, 158
refer also to the separate
Owner's Manual
Car vacuum cleaner, connecting 93
Car wash 128
Care exterior 129
interior 131
rubber seals and
components 108
upholstery 131
wool velour 131
Cargo loading 97