CITROEN DS4 Owner's Handbook Manual page 86

5. Air conditioning On / Off
 Press this button to switch off
the air conditioning.
Switching the system off could result in
discomfort (humidity, condensation).
 Press this button again to return to
automatic operation of the air conditioning.
The indicator lamp on the "A/C" button
comes on.
6. Air distribution adjustment
 Press one or more buttons to
direct the air flow towards:
- the windscreen and side windows
(demisting or defrosting),
- the outer and centre air vents,
- the footwells.
You can combine the three orientations to
obtain the desired air distribution.
7. Air fl ow adjustment
 Turn this control to the left to
decrease the air flow or to the
right to increase the air flow.
The air flow indicator lamps, between the two
fans, come on progressively in relation to the
value requested.
8. Air intake / Air recirculation
 Press this button for
recirculation of the interior
air. The indicator lamp in the
button comes on.
Air recirculation enables the passenger
compartment to be isolated from exterior
odours and smoke.
 As soon as possible, press this button
again to permit the intake of outside air and
prevent the formation of condensation. The
indicator lamp in the button goes off.
9. "REST" function: ventilation
with the engine off
Even with the engine is off, you can
operate the ventilation for a few
minutes.
For example, while you are away from the
vehicle, the passengers can still enjoy some air
circulation without having the engine running.
This function is available after switching on the
ignition, as well as after stopping the engine.
The period that the function is available
depends on the state of charge of the battery.
You can activate the "REST" function while the
air conditioning control screens are on.
Avoid prolonged operation in interior air
recirculation mode (risk of misting and
deterioration of air quality).