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Comfort -> Dual-zone digital air conditioning for Your Citroen Ds4 SUV Second Generation (2021-2025)

Dual-zone digital air conditioning  
The air conditioning system operates when the engine is running.  
Automatic operation  
When the engine is cold, the air  
flow will reach its optimum level  
progressively, taking account of the  
weather and the desired comfort level  
so as to avoid too great a distribution  
of cold air.  
On entering the vehicle, if the interior  
temperature is much colder or warmer  
than the comfort value, there is no  
need to change the value displayed in  
order to obtain the comfort required.  
The system corrects the difference  
in temperature automatically and as  
quickly as possible.  
1. Automatic comfort programme  
We recommend the use of one of  
the three AUTO modes available:  
they provide optimised regulation of  
the temperature in the passenger  
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Press the "AUTO" button repeatedly:  
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a first indicator lamp comes on; the  
"light" setting mode is selected,  
a second indicator lamp comes on; the  
"medium" setting mode is selected,  
a third indicator lamp comes on; the  
"intense" mode setting is selected.  
compartment according to the comfort value  
that you have chosen.  
These three modes automatically adjust the  
air flow, according to the desired setting, while  
also maintaining the desired comfort value.  
This system is designed to operate effectively  
in all seasons, with the windows closed.  
 
83  
Comfort  
Manual operation  
If you wish, you can make a different choice  
from that offered by the system by changing  
a setting. The the "AUTO" indicator lamps go  
off; the other functions will still be controlled  
automatically.  
2. Driver's side adjustment  
4. Automatic visibility  
programme  
See "Front demisting - defrosting".  
3. Passenger's side adjustment  
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Pressing the "AUTO" button returns the  
system to completely automatic operation.  
The driver and front passenger can  
each adjust the temperature to their  
requirements.  
The value indicated on the display  
corresponds to a level of comfort and not to a  
temperature in degrees Celsius or Fahrenheit.  
For maximum cooling or heating of the  
passenger compartment, it is possible  
to exceed the minimum value 14 or the  
maximum value 28.  
With Stop & Start, when demisting has  
been activated, the STOP mode is not  
available.  
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Turn control 2 or 3 to the left or to the right  
respectively to decrease or increase this  
value.  
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Turn control 2 or 3 to the left until  
"LO" is displayed or to the right  
until "HI" is displayed.  
A setting around the value 21 provides  
optimum comfort. However, depending on your  
requirements, a setting between 18 and 24 is  
normal.  
You are advised to avoid a left/right setting  
difference of more than 3.  
 
5. Air conditioning On/Off  
7. Air ßow adjustment  
9. "REST" function: ventilation  
with the engine off  
Even with the engine is off, you can  
operate the ventilation for a  
few minutes.  
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Press this button to switch off  
the air conditioning.  
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Turn this control to the left to  
decrease the air flow or to the  
right to increase the air flow.  
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.  
Switching the system off could result in  
discomfort (humidity, condensation).  
The air flow indicator lamps, between the two  
fans, come on progressively in relation to the  
value requested.  
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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  
8. Air intake/Air recirculation  
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Press one or more buttons to  
direct the air flow towards:  
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Press this button for  
recirculation of the interior air.  
The indicator lamp in the button  
comes on.  
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the windscreen and side windows  
(demisting or defrosting),  
the outer and centre air vents,  
the footwells.  
Air recirculation enables the passenger  
compartment to be isolated from exterior  
odours and smoke.  
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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.  
You can combine the three orientations to  
obtain the desired air distribution.  
 
85  
Comfort  
Switching the system off  
On switching on the engine  
On stopping the engine  
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Turn the air flow control to  
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The control screens come on: the function  
is available.  
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While the control screens remain on: the  
function is available.  
the left until all of the indicator  
lamps go off.  
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Pressing the REST button activates the  
ventilation for a few minutes. Activation of  
the function is confirmed by the display of  
two dashes in the control screens and four  
air flow level indicator lamps.  
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Pressing the REST button activates the  
ventilation for a few minutes. Activation of  
the function is confirmed by the display of  
two dashes in the control screens and four  
air flow level indicator lamps.  
This action switches off the air conditioning and  
the ventilation.  
Temperature related comfort is no longer  
assured but a slight flow of air, due to the  
movement of the vehicle, can still be felt.  
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The function can be deactivated and  
reactivated if the control screens are on.  
The screens go off at the end of this period.  
Locking the vehicle has no effect on this  
function.  
The control screens go off at the end of  
this period.  
Pressing again before the end of the period  
interrupts off the ventilation definitively: the  
control screens go off and the function is  
no longer available.  
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Modify the settings (temperature, air flow or  
air distribution) or press the "AUTO" button  
to reactivate the system with the values set  
before it was switched off.  
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This switch does not operate the air conditioning, only the air fan.  
When the "REST" function is activated, you cannot modify the temperature, air flow  
and distribution settings: these are controlled automatically according to the ambient  
temperature.  
Avoid prolonged operation in interior  
air recirculation mode or driving for  
long periods with the system off (risk of  
condensation and deterioration of air  
quality).  
This function is not available in the STOP mode of Stop & Start.