2001 BMW Z8 air condition

73n
IndexDataTechnologyRepairsCar careControlsOverview
Heating and ventilation/Air conditioner1 Air onto the windshield and the side
windows
2 Air flow for the upper body
The rotary dials make it possible for
you to open and close the air supply
through an infinitely-variable range,
while the levers change the air-flow
direction. Refer to page 75
3 Front footwell ventilation
4 Air supply
Both the heating and ventilation are
available from position 1 on. Refer to
page 74
5 To defrost windows and remove
condensation75
6 Temperature74
7 Air distribution toward
>the windows
>the upper body
>the footwell
An infinitely-variable range of inter-
mediate settings is also available.
Refer to page 74
8 Rear window defroster with the
hardtop in place75
9 Operating:
>Recirculated air74
>Incoming air74
>Air conditioner/Incoming air74
>Air conditioner/Recirculated air74

74n
Heating and ventilation/Air conditionerAir supply
You can select blower speeds
from 1 to 4. The higher the
setting, the greater the
amount of heat and air supply.
In position 0, the blower, heating and air
conditioner are switched off.
Temperature
In order to increase the inte-
rior temperature, turn to the
right. For rapid heating, turn
completely to the right. Then
select an interior temperature that is
comfortable for you.
Air distribution
You can direct the airflow onto
the windows , toward the
upper body and into the
footwell . You can also make
all intermediate settings. The "6 o'clock"
setting is recommended for normal
conditions (refer also to the illustration
and overview on page 72).
Recirculated air mode
If there are unpleasant odors
in the incoming air, you can
temporarily block the air
supply. The system then recir-
culates the air already within the
vehicle.
If condensation starts to form on
window surfaces during opera-
tion in the recirculated-air mode, switch
it off and return the ventilation system
to the incoming air mode; turn up the
blower and select the defroster if
necessary to clear the windows.<
Incoming air mode
Recommended when driving
with the convertible top open.
The degree to which the
passenger compartment is
heated depends on temperature selec-
tion and air distribution.
Air conditioner/incoming air mode
The air is cooled and dehu-
midified and Ð depending on
the temperature setting Ð
warmed again when the air
conditioner is switched on. Depending
on the weather, the windshield may fog
over briefly when the engine is started.
Do not turn on the air conditioner if the
outside air temperature is below
approx. 41 7 (5 6). This will help to
prevent the windows from fogging.
If the windows fog over after switching
the air conditioner off, switch it back on.
Air conditioner/Recirculated air
mode
You may find it useful to acti-
vate both systems to cool the
car more rapidly after it has
been parked with the top up
on a hot day. This setting provides the
coldest possible airflow from the vent
outlets (with temperature selection
switch turned all the way to the left).

75n
IndexDataTechnologyRepairsCar careControlsOverview
Heating and ventilation/Air conditioner
If condensation starts to form on
window surfaces during operation
in the recirculated-air mode, switch it
off and return the ventilation system to
the incoming air mode; turn up the
blower and select the defroster if
necessary to clear the windows.<
To defrost windows and remove
condensation
This operation quickly
removes ice and condensa-
tion from the windshield and
the side windows.
Rear window defroster
Whenever the hardtop is on,
the indicator lamp lights up
when the rear window
defroster is turned on. The rear window
defroster switches off automatically.
Refer to page 60.
The indicator lamp is always
active, however the rear window
defroster will not work if the hardtop is
not in place.<
Draft-free ventilation You can adjust the air outlets for the
upper body area for your personal
comfort:
Use rotary dials 1 to open and close the
air outlets through an infinitely-variable
range.520de043
You can adjust the direction of the
airflow using the levers 2.
Set the air outlets so that the air flows
past you and is not directed straight at
you.MicrofilterThe microfilter removes dust and pollen
from the outside air. Your BMW center
will change this filter during routine
maintenance. A substantial reduction in
air flow indicates that the filter needs to
be replaced early.520de140

76n
Heating and ventilation/Air conditionerRapid ventilation1 Set the rotary blower switch to
position 4 for air intake
2 Turn the rotary temperature control
completely to the left
3 Rotary control for air distribution in
position
4 Select incoming air
5 Open the air outlets for the upper
body area.520de161
Cooling1 Set the rotary blower switch to
position 2 for air intake
2 Use the rotary temperature control
to select an interior temperature
comfortable for you
3 Rotary control for air distribution in
position
4 Select air conditioner/incoming air
5 Open the air outlets for the upper
body area.520de129
Rapid cooling1 Set the rotary blower switch to
position 4 for air intake
2 Turn the rotary temperature control
completely to the left
3 Rotary control for air distribution in
position
4 Select air conditioner/recirculating air
5 Open the outlets for the upper body
area.520de097

77n
IndexDataTechnologyRepairsCar careControlsOverview
Heating and ventilation/Air conditioner Seat heatingRapid heating 1 Set the rotary blower switch to
position 3 for air intake
2 Turn the rotary temperature control
completely to the right
3 Rotary control for air distribution to
position
4 Select incoming air mode.520de045
HeatingWhen the windows are free of ice and
condensation, we recommend the
following settings:
1 Set the blower speed control for the
air flow rate to position 2
2 Use the rotary temperature control to
select an interior temperature which
is comfortable for you
3 Rotary control for air distribution in
position .520de047
The seat cushion and backrest can
be heated when the ignition key is in
position 2.
By repeatedly pressing the button, you
can select one of three different opera-
tion modes:
>Two indicator lamps on: heating at
high temperature
>One indicator lamp on: heating at low
temperature
>Indicator lamps off: seat heating
deactivated.520de048

Overview
Controls and features
Operation, care
and maintenance
Owner service procedures
Technical data
Index Advanced technology
85n
IndexDataTechnologyRepairsCar careControlsOverview
Car care Special operating instructions:
Break-in procedures86
Driving notes87
Catalytic converter87
Antilock Brake System (ABS)88
Dynamic Brake Control
(DBC)90
Disc brakes90
Brake system91
Winter operation92
Power steering94
Cellular phone94
Radio reception94
Wind deflector95
Hardtop96
Wheels and tires:
Tire inflation pressure98
Tire condition98
Tire replacement99
Tire rotation100
Wheel and tire
combinations101
Special features of winter
tires102
Snow chains102
Approved wheel and tire
specifications103Under the hood:
Hood104
Engine compartment106
Washer fluids108
Washer nozzles108
Engine oil109
Coolant111
Brake fluid112
Vehicle Identification
Number113
Maintenance and care:
The BMW Maintenance
System114
Caring for your vehicle115
Airbags121
Vehicle storage122
Laws and regulations:
Technical modifications123
California Proposition 65
Warning123
OBD interface socket124

90n
Dynamic Brake Control (DBC) Disc brakesIf you step on the brake rapidly, this
system automatically produces maxi-
mum braking force boost and thus
helps to achieve the shortest possible
braking distance during "panic stops."
All of the benefits of the ABS system
are exploited under these circum-
stances.
Do not reduce the pressure on the
brake pedal during the brake applica-
tion. When the brake pedal is released,
the DBC is deactivated.
In the event of a malfunction,
the yellow brake warning lamp
comes on. Normal braking effi-
ciency and ABS are still fully
available. Have the system
checked and repaired at your
BMW center as soon as possible.
For your safetyNot even DBC can suspend the laws
of physics. The consequences of brake
applications with inadequate clear-
ances for safety between vehicles,
excessive speed or if aquaplaning
occurs are always the responsibility of
the driver. You should never allow the
added safety provided by DBC to
mislead you into taking risks of any
kind.Disc brakes furnish optimum decelera-
tion and braking control and greater
fade resistance under heavy use.
When the vehicle is driven only occa-
sionally, during extended periods when
the vehicle is not used at all, or in oper-
ating conditions where brake applica-
tions are less frequent, there is an
increased tendency for corrosion of the
rotors and accumulation of contamina-
tion on the brake pads. This occurs
because the minimal pressure which
must be exerted by the pads to clean
the rotors by brake applications is not
achieved.
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.
For your own safety: use only
brake pads BMW has approved
for your specific vehicle model. BMW
cannot evaluate 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.<

91n
IndexDataTechnologyRepairsCar careControlsOverview
Disc brakes Brake systemDriving notesWhen driving in heavy rain and on wet
roads it is advisable to apply light pres-
sure 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 braking process helps
dry the pads and rotors.
Maximum braking force is obtained
while the wheels are not locked, but
rather when they are still barely turning
immediately prior to locking. ABS main-
tains this state automatically. If the ABS
fails, you should revert to the staggered
braking technique (refer to page 93).
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.
You can enhance the engine's braking
effect by engaging a lower gear, down-
shifting as far as first gear when
descending extremely steep slopes. Even if engine braking fails to slow the
vehicle sufficiently, you should still
make every effort to avoid prolonged
braking with continuous application of
low to moderate pressure at the pedal.
It is better to decelerate the vehicle by
applying a higher level of force at the
pedal (watch following traffic!) and then
subsequently pausing to allow the
brakes to cool briefly before starting on
your next braking cycle. By protecting
brake system components against
overheating, the cooling phases
afforded by this staggered, or intermit-
tent braking technique help maintain
consistent availability of optimal braking
response when it is needed.
Do not coast with the clutch
depressed, the gear-shift lever in
neutral, or, above all, with the engine
off; otherwise, the engine will provide
no braking effect if the transmission is
in neutral, and there is no braking or
steering power assist if the engine is
not running. Never allow floor mats,
carpets or any other objects to obstruct
the accelerator, clutch or brake pedals
and pose a safety hazard by reducing
their available travel range.<
Brake fluid level
The brake warning lamp comes
on with the parking brake
released:
The brake fluid level in the reser-
voir is too low, refer to page 112.
If the brake fluid level is too low
and brake pedal travel has become
noticeably longer, there may be a
defect in one of the brake system's
hydraulic circuits.
Proceed to the nearest BMW
center. Higher brake application
pressure may be necessary under these
conditions, and brake pedal travel may
be significantly longer. Please
remember to adapt your driving style
accordingly.<