2001 BMW 330Ci CONVERTIBLE climate control

106n
Automatic climate control
*
Rear window defroster
When the rear window defroster
is activated, the indicator lamp
comes on. The rear window defroster
switches off automatically. Refer to
page 78.
Draft-free ventilation You can adjust the blower controls for
the upper body area to select the
optimum air flow rates and directions
for your personal requirements:
Use rotary dials 1 to open and close the
air outlets through an infinitely-variable
range. You can adjust the direction of
the air flow with levers 2.
Set the outlets so that the air flows past
you and is not directed straight at you.
Rotary dial 3 allows you mix the air from
the outlets for your upper body by
warming or cooling the air as desired.460de040
Microfilter/Activated-charcoal
filterThe microfilter filters out dust and
pollen from the incoming air. The acti-
vated-charcoal filter helps clean the
incoming outside air of gaseous pollut-
ants. Your BMW center will replace this
combined filter during the regularly
scheduled maintenance. A substantial
reduction in air supply indicates that the
filter must be replaced before normal
maintenance.
For further information on the filter
change, refer to page 180.

133n
IndexDataTechnologyRepairsCar careControlsOverview
To maintain good handling and vehicle
response, use only tires of a single
tread configuration from a single manu-
facturer. BMW tests and approves
wheel/tire combinations, beginning on
page 137.DOT Quality Grades Treadwear
Traction AA A B C
Temperature A B C
All passenger vehicle tires must
conform to Federal Safety
Requirements in addition to these
grades.< Tread wearThe tread wear grade is a comparative
rating based on the wear rate of the tire
when tested under controlled condi-
tions on a specified government test
course.
For example, a tire graded 150 would
wear one and one-half (1g) times as
well on the government course as a tire
graded 100. The relative performance
of tires depends upon the actual condi-
tions of their use, however, and may
depart significantly from the norm due
to variations in driving habits, service
practices and differences in road char-
acteristics and climate.
TractionThe traction grades, from highest to
lowest, are AA, A, B, and C.
Those grades represent the tire's ability
to stop on wet pavement as measured
under controlled conditions on speci-
fied government test surfaces of
asphalt and concrete. A tire marked C
may have poor traction performance.
The traction grade assigned to
this tire is based on straight-
ahead braking traction tests, and does
not include acceleration, cornering,
hydroplaning, or peak traction
characteristics.< TemperatureThe temperature grades are A (the
highest), B, and C, representing the
tire's resistance to the generation of
heat and its ability to dissipate heat
when tested under controlled condi-
tions on a specified indoor laboratory
test wheel.
Sustained high temperature can cause
the material of the tire to degenerate
and reduce tire life, and excessive
temperature can lead to sudden tire
failure. The grade C corresponds to a
level of performance which all
passenger vehicle tires must meet
under the Federal Motor Vehicle Safety
Standard No. 109. Grades B and A
represent higher levels of performance
on the laboratory test wheel than the
minimum required by law.
The temperature grade for this tire
is established for a tire that is
properly inflated and not overloaded.
Excessive speed, underinflation, or
excessive loading, either separately or
in combination, can cause heat buildup
and possible tire failure.< Uniform Tire Quality Grading Quality grades can be found where
applicable on the tire sidewall between
tread shoulder and maximum section
width. For example:
Tread wear 200 Traction AA
Temperature A
Do not use retreaded tires. Driving
safety may be impaired by their
use. This is due to the possible varia-
tions in casing structures and, in some
cases, to their extreme age, factors that
can lead to a decrease in their
durability.<
Tire replacement

192n
Tire Pressure Control* Self-diagnostics This system regularly checks tire pres-
sure and monitors all four tires even
while driving, so you do not have to.
Behind the valve stem in every wheel,
there is an extended-life electronic chip
that contains a pressure sensor, a
transmitter and a battery. The pressure
is measured in extremely short time
intervals and then transmitted by a
radio signal. If an irregularity is
detected, the transmission rate is
increased.
Located near each wheel and
embedded in the vehicle body is an
antenna that receives signals from the
wheel. A central electronics system
evaluates the quadruple signals and
forwards any changes.
The RDC provides an important contri-
bution to driving safety.46cde078
All
of the important electrical and elec-
tronic systems in the vehicle are tested
regularly and automatically Ð the driver
does not have to perform any extra
operations or adjustments.
The indicator lamps come on brießy
after the ignition has been turned on, for
example.
While you are driving, the functional
status of the actuator motors (for the
windshield wipers, power windows,
seats, etc.) is constantly being analyzed
by electrical measurements in the relays.
In the same manner, the electrical
resistance of the airbag ignition genera-
tors and all of the remaining airbag
components is measured at all times. Any
fault in this system would be detected
immediately by a current ßuctuation that 46cde052
would necessarily accompany it.
The fault
would be indicated immediately by the
airbag warning lamp.
Even after you shut off the engine, the
overall functional status of your vehicle is
monitored. For example, all of the ßaps of
the heating and ventilation system travel
to the nearest limit position. This action
ensures that the system will be able to
provide defrosting, regardless of other
circumstances, e. g. if a malfunction in the
air conditioner/automatic climate control
system
* should occur during the night
while the vehicle is parked.
A calibration cycle runs every tenth time
the engine is shut off. During this cycle,
the actuator motors of all the heating and
ventilation ßaps travel to their limit stops
in both directions. The limit positions and
the return travel paths are checked in this
manner in order to ensure that appro-
priate adjustments for the operating
elements can be made at any time.
You will hear the sounds of the air ßaps as
the air conditioner/automatic climate
control* carries out its self-diagnostic
functions after the ignition has been shut
off. All of the other self-diagnostics func-
tions operate silently in the background.
Any possible faults detected during these
self-diagnostics can be read out and
corrected by your BMW center
during the
next regularly scheduled maintenance.

Everything from A to Z
A
ABS (Antilock Brake System) 22,122
Accessories 6
Activated-charcoal filter 106,180
Adaptive Transmission Control (ATC) 73,188
Adding engine oil 145
Adding washer fluid 144,199
Adjusting backrest 52
Adjusting headrests 53
Adjusting the steering wheel 57
Adjusting the temperature 98,104
Adjusting thigh support 54
Air conditioner 96
Air distribution 98,104
Air nozzles 96,102
Air outlets 96,102
ventilation 96,102
Air pressure, tires 27,132
Air supply 98,105
Airbags 21,61 ,159 ,189
sitting properly with 62
Alarm system 42
Antenna 129
Antenna, Diversity 190 Antifreeze
147
radiator 127
Antilock Brake System (ABS) 22,122
Anti-theft alarm system 42
Aquaplaning 121,132
Armrest 110
ASC+T (Automatic Stability Control plus
Traction) 22,88
Ashtray front 111
rear 112
ATC (Adaptive Transmission Control) 73,188
Attach vacuum cleaner 112
AUC (Automatic recirculated-air
control) 105
Automatic car washes 151
Automatic climate control 102
remove window
condensation 105
Automatic cruise control 79
Automatic dimming, interior rearview mirror 58
Automatic recirculated-air control (AUC) 105
Automatic Stability Control plus Traction
(ASC+T) 22,88 Automatic transmission with
Steptronic 21,73
Automatic windshield washer 77
Average consumption 85
Average speed 86
Avoiding unwanted alarm 43
Axle loads 198
B
Backrest adjusting 52
locking 21,55
releasing 55
Backup lamps 72
bulb replacement 169
Battery 176,200
capacity 200
charge current 20,176
charging 178
discharged 183
removal and
installation 178
Belts 60
Beverage holder 111
Blower 98,105
BMW High Performance Synthetic Oils 146
BMW Maintenance System 150 BMW sports seat
54
Bore 196
Brake fluid 148
Brake hydraulic system 20
Brake lamps, bulb replacement 169
Brake pads 22,126
Brake system 126
Brakes 125
malfunctions 126
Break-in procedures 120
Bulb replacement 166
C
California Proposition 65 Warning 161
Capacities 199
Car Memory 59
Car radio 129
reception 129,190
refer also to the Radio
Owner's Manual
Car washes 151
Care convertible top 157
exterior 152
interior 154
leather upholstery 155
rubber seals and
components 127