2008 AUDI A4 cooling

Heating and cooling105
Controls
Safety
Driving tips
General maintenance
Self-help
Technical data
– Press the button for the blower .
– Turn the rotary control to set the blower to the desired
speed (and regulate the volume of air delivery).The air conditioning system automatically regulates the blower
speed according to the interior temperature. However, you can also
adjust the blower speed manually.
The blower speed will be shown on the screen ⇒fig. 116 for a few
seconds if the sound system or MMI* is switched on.
Note
•
The blower speed may change automatically. This ensures that
the selected temperature is reached as quickly as possible.
•
The blower speed cannot be regulated separately for the driver
and front passenger sides of the vehicle.
Applies to vehicles: with deluxe automatic air conditioner plusAir recirculation mode
The air recirculation setting prevents fumes etc. from
entering the interior.Switching on the air recirculation mode
– Press the button ⇒.
Switching off the air recirculation mode
– Press the button again, or
– Press the button, or
– Press the button.In this setting, the air is drawn from the interior of the vehicle,
filtered and continuously recirculated. We recommend using the air
recirculation mode in the following circumstances:
When driving through a tunnel or in queues of traffic, to prevent
fumes entering the interior of the vehicle.
WARNING
For reasons of safety you should not leave the air recirculation
switched on for too long. This mode prevents fresh air from
entering the vehicle, so the windows can mist over if the air
cooling is switched off. Bad visibility can cause an accident.
Fig. 116 Display:
Blower setting


AUTO
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Heating and cooling 106Applies to vehicles: with deluxe automatic air conditioner plusAir distribution

The automatically programmed air distribution can be
altered manually if required.– Press the button for Distribution

.
– Turn the rotary control to the desired setting.
You can use the air distribution setting to select the air outlets you
wish to activate. In setting
 all the air is directed to the windows,
in setting
 the air is directed to the driver (or passenger), and in
setting
 to the footwells. In addition to this there are several other
possible combinations, allowing you to adjust the air distribution to
suit individual requirements.Switch to for automatic control of the air distribution.
The air distribution setting will be shown on the MMI display
⇒fig. 118 for a few seconds if the MMI is switched on.
Applies to vehicles: with deluxe automatic air conditioner plusDefrosting
The windscreen and side windows are defrosted or
demisted as quickly as possible.– To switch on, press the button.
– To switch off, press the button again, or press the
button.The temperature is regulated automatically. The air output is
increased to maximum and most of the air comes out of the outlets
below the windscreen.
The air recirculation mode is switched off when the button is
pressed.Applies to vehicles: with deluxe automatic air conditioner plusHeated rear window
The rear window heating helps to demist the rear window.– Press the

b u t t o n t o s w i t c h t h e r e a r w i n d o w h e a t i n g o n
and off.
The rear window heating only works when the engine is running. An
indicator lamp in the button lights up when the rear window heater
is switched on.
Depending on the outside temperature, the rear window heating
switches off automatically after about 10 to 20 minutes.
The rear window heating can be switched on permanently by
pressing the
 button for longer than two seconds. It will then
Fig. 117 Air distribu-
tion button and rotary
controlFig. 118 Display: Air
distribution
AUTO


AUTO


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Heating and cooling107
Controls
Safety
Driving tips
General maintenance
Self-help
Technical data remain on until the ignition is switched off. When the rear window
heating is switched on, this setting will remain activated for 15
minutes after switching off the ignition.
If the engine is started again during this period of 15 minutes, the
rear window heating will be switched on for about 10 to 20 minutes,
depending on the exterior temperature. This means you do not have
to manually switch on the rear window heating again if the vehicle
has only been parked for a short time.
For the sake of the environment
Switch off the heated rear window manually as soon as the rear
window is clear. By saving electrical power you can also save fuel.Applies to vehicles: with deluxe automatic air conditioner plusAC mode Deactivating the AC mode
– Press the button.
Activating the AC mode
– Press the button again.In the AC mode, the air cooling system is switched on and the
heating and ventilation are regulated automatically.
Note
If the LED in the AC button should continue to light up when the AC
mode has been switched off (i.e. the air conditioner has been
switched off) this is due to a defect in one of the air conditioner
components. If a malfunction should occur, please contact a quali-
fied workshop.
Applies to vehicles: with deluxe automatic air conditioner plusAir outlets
The air distribution setting directs the air to the outlets
you select.Fig. 119 Dashboard: Location of air outletsAir outlets and
– The outlets can be opened and closed by turning the
thumbwheels next to them.
– The direction of air delivery from these outlets can be
adjusted horizontally and vertically using the adjuster in
the centre of each outlet grille.The flow of air from the outlets is controlled either automatically or
manually, depending on the operating mode selected. Outlets to
can provide air which is either heated, unheated, or cooled.
ACACAC
A2
A3
A1
A4
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Heating and cooling 108
NoteWhen the air conditioner is operating in the cooling mode, the air is
directed mainly to outlets and . To ensure an adequate cooling
effect, you should not close these outlets completely.Applies to vehicles: with deluxe automatic air conditioner plusAir outlets for rear passengers
The air outlets for the rear cabin are located in the centre
console.– The outlets can be opened and closed by turning the
thumbwheels.
– The direction of air delivery from these outlets can be
adjusted horizontally and vertically using the adjuster in
the centre of each outlet grille.The flow of air from the outlets is controlled either automatically or
manually, depending on the operating mode selected. All the
outlets can provide air which is either heated, unheated, or cooled.
The heater outlets for the rear footwells are located under the front
seats.
Note
When the air conditioner is operating in the cooling mode the air is
directed mainly to the outlets in the centre console. To ensure an
adequate cooling effect, you should not close these outlets
completely.
Applies to vehicles: with deluxe automatic air conditioner plusEconomical operation of the air conditioner
Economical operation of the air conditioner will help to
save fuel.When the air conditioner is operating in the cooling mode it
reduces engine power and increases fuel consumption. To
ensure that the cooling mode is activated only when really
necessary, please note the following points:
– Switch off the cooling mode by pressing the AC button
(LED off) if you wish to save fuel.
– You should also switch off the cooling mode by pressing
the AC button (LED off) if you open the windows or the
tilting panorama roof* while driving.
– If the vehicle has heated up after standing in the sun,
open the windows and doors for a short time to cool the
vehicle.
For the sake of the environmentBy saving fuel you also reduce the amount of pollutants emitted
from your vehicle.
A2
A3
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Heating and cooling109
Controls
Safety
Driving tips
General maintenance
Self-help
Technical data
Deluxe automatic air conditioner plus
- basic settingsApplies to vehicles: with deluxe automatic air conditioner plusGeneral notes
The basic settings for the air conditioner can be adjusted
via the sound system or MMI*.– Select: Function selector button > control button
AC.The following functions are available:•
Automatic air recirculation ⇒page 109
•
Synchronisation ⇒page 109
•
Auxiliary heating* ⇒page 110
•
Auxiliary ventilation* ⇒page 110
•
Running time* ⇒page 112
•
Timer status* ⇒page 111
•
Timer 1* ⇒page 111
•
Timer 2* ⇒page 111
•
Timer 3* ⇒page 111
•
Supplementary heater* ⇒page 110
Applies to vehicles: with deluxe automatic air conditioner plusAutomatic recirculation
If the outside air is polluted, an air purity sensor in the
vehicle will automatically switch on the air recirculation.To prevent fumes, etc. in the outside air from entering the interior,
we recommend that the automatic air recirculation should be
switched on at all times.
If the air purity sensor in the air conditioner system detects a certain
concentration of fumes in the outside air, the control unit will either
pass the incoming air through the pollution filter or automatically
switch on the air recirculation. If there is a high concentration of
pollution in the outside air, the air conditioner automatically
switches to air recirculation and cuts off the supply of air from the
outside. As soon as the level of pollution decreases, air is fed into
the vehicle from the outside again.
If the windows mist up when the automatic air recirculation is on,
press the
 button immediately.
The automatic air recirculation can switch itself off in certain condi-
tions. If the outside temperature is less than about +10 °C, the auto-
matic air recirculation will only operate for 30 seconds. If the air
conditioner is switched to the ECON mode, or if the outside temper-
ature is less than about -1 °C, the automatic air recirculation will
only operate for 15 seconds.
Applies to vehicles: with deluxe automatic air conditioner plusSynchronisation
The air conditioner settings can be synchronised for all
passengers.When the synchronisation function is switched on, all subsequent
air conditioner settings made on the driver's side (except for the
seat heating*) are also applied to the front passenger's side.
Fig. 120 Display:
Setup AC
CAR
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Heating and cooling 110The synchronisation is cancelled as soon as any adjustments are
made on the front passenger's side.Applies to vehicles: with diesel engineSupplementary heater– Set the Supplementary heater to auto or off.Models with a diesel engine are equipped with a supplementary
heater to help warm up the interior more quickly. At outside temper-
atures below about +5 °C the supplementary heater is switched on
(and off) automatically when the engine is running, depending on
the coolant temperature, the temperature in the vehicle interior and
the temperature the heater is set to.Auxiliary heating and auxiliary
ventilationApplies to vehicles: with auxiliary heating - under development at the time of printingDescription
The auxiliary heating and ventilation systems heat and
cool the interior independently of the engine.The auxiliary heating
 works in conjunction with the air condi-
tioner system, but does not rely on heat from the engine. Instead of
this, the system burns fuel. The system's main function is to warm
up the interior of the vehicle and to defrost the windows in cold
weather.
The auxiliary heating system can be used both when the vehicle is
stationary and when driving (to provide extra heat while the engine
is warming up).The auxiliary ventilation
 also operates independently of the
engine. This feature can be used to cool the interior with the blower
when the vehicle is left parked in the sun.
The system will automatically activate either the auxiliary heating or
the auxiliary ventilation mode, depending on the actual tempera-
ture measured inside the car and the temperature you have set with
the air conditioner controls. It is possible to alter the temperature
setting while the auxiliary heating/ventilation is running.
Switching on and off
There are two different ways of switching on the auxiliary
heating/ventilation system.
•
Immediate start: You can switch the auxiliary heating/ventilation
on and off at any time via the sound system or MMI ⇒page 111. You
can also switch the system on and off using the remote control
⇒page 113.
•
Switching on via timer: You can programme various start times
using the timers ⇒page 111. However you must first activate the
timer before the auxiliary heating/ventilation system will switch on
automatically.
The auxiliary heating/ventilation will switch itself off at the end of
the programmed running time. The running time can be set to 15,
30, 45 or 60 minutes ⇒page 112.
WARNING
•
The auxiliary heating must not be allowed to run when the
vehicle is in a confined space because it can give off toxic fumes.
•
To avoid any possible fire risk, never have the auxiliary heating
switched on when refuelling the vehicle.
•
Because of the high temperatures which occur when the auxil-
iary heating is running, make sure when parking the car that the
exhaust outlet under the car is not obstructed in any way and that
the exhaust gases do not come into contact with flammable mate-
rials (fire risk).
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Heating and cooling111
Controls
Safety
Driving tips
General maintenance
Self-help
Technical data
Note
•
It is advisable to open the air outlets when using the auxiliary
heating/ventilation.
•
The auxiliary heating/ventilation will not switch on if the fuel in
the tank has reached the reserve zone.
•
The auxiliary heating/ventilation will not switch on if the battery
charge level is low.
•
The symbols
 (auxiliary ventilation) or
 (auxiliary heating)
flash in the instrument cluster next to the clock display when the
auxiliary heating/ventilation is switched on. Both symbols light
continuously when the timer is activated.
•
At low outside temperatures some visible water vapour may
form in the engine compartment. This is a normal phenomenon,
and no reason for concern.
Applies to vehicles: with auxiliary heating - under development at the time of printingSwitching on/off immediately
You can switch the auxiliary heating/ventilation on and
off immediately via the sound system or MMI*.– Select: Function selector button > control button
AC > Aux. heating or Aux. ventilation.
When the auxiliary heating/ventilation is running, you can press the
button on the air conditioner console to switch off the blower
only. Pressing the button a second time will switch on the
blower again.
Note
The symbols
 (auxiliary ventilation) or
 (auxiliary heating) flash in
the instrument cluster next to the clock display when the auxiliary
heating/ventilation is switched on.
Applies to vehicles: with auxiliary heating - under development at the time of printingSetting and activating the timers
You can make the desired settings for the auxiliary
heating/ventilation on the sound system or MMI*.
Fig. 121 Display:
Setup AC
CAR
OFF
OFF
Fig. 122 Display: Timer
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Heating and cooling 112
Setting the timers
– Select: Function selector button > control button
AC > e.g. Timer 1 ⇒page 111, fig. 122.
Activating a timer
– Select: Function selector button > control button
AC > Timer status ⇒fig. 123.Three timers are available for the auxiliary heating/ventilation. You
can set a starting time and running time for each of the timers.
When the time set on one of the timers elapses, the date automati-
cally changes to the next day and the Timer status is reset to off. You
have to activate one of the timers (e.g. T1 on) before it will switch on
the auxiliary heating/ventilation at the time you have set. This
prevents the auxiliary heating/ventilation from switching on when
you are not using your vehicle.
Note
Before activating the timer, make sure that the correct time and date
settings have been entered. If the time and/or date are not correct,
the auxiliary heating will come on late or not at all. Please refer to
the MMI Operating Instructions for information on how to set the
date and time.
Applies to vehicles: with auxiliary heating - under development at the time of printingSetting the running time
You can set the running time on the sound system or
MMI*.– Select: Function selector button > control button
AC > Running time.The running time for the auxiliary heating/ventilation can be set to
a time between 15 and 60 minutes. The auxiliary heating/ventilation
will switch itself off at the end of the programmed running time.
Fig. 123 Display: Timer
status
CARCAR
Fig. 124 Display:
Running time
CAR
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