Auxiliary Heating And Auxiliary Ventilation - Audi S5 Owner's Manual

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108 Heating and cooling
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 plus
Synchronisation
The air conditioner settings can be synchronised for all
passengers.
When the synchronisation function is on, the driver's settings are
also applied to the front passenger or vice versa. Any subsequent
changes to the air conditioner settings (except for the seat heating*)
are also applied to the other occupant.
You can still change the setting on the "synchronised" side (this will
deactivate the synchronisation function).
Auxiliary heating and auxiliary
ventilation
Applies to vehicles: with auxiliary heating - under development at the time of printing
Description
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 in the MMI Car menu ⇒ page 109. You can
also switch the system on and off using the remote control
⇒ page 111.
Switching on via timer: You can programme various start times
using the timers ⇒ page 110. 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 111.
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