boot CITROEN C5 2021 User Guide
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Access
 
 
 
 
System which protects and provides a deterrent 
against theft and break-ins.
Exterior perimeter monitoring
The system checks for opening of the vehicle.
The alarm is triggered if anyone tries to open a 
door, the boot or the bonnet, for example.
Interior volumetric monitoring
The system checks for any variation in volume in 
the passenger compartment.
The alarm is triggered if anyone breaks a 
window, enters the passenger compartment or 
moves inside the vehicle.
Anti-tilt monitoring
The system checks for any change in the attitude 
of the vehicle.
The alarm goes off if the vehicle is lifted or 
moved.
When the vehicle is parked, the alarm 
will not be triggered if the vehicle is 
knocked.
Self-protection function
The system checks whether any of its 
components are out of service.
The alarm is triggered if the battery, the central 
control or the siren wiring is put out of service or 
damaged.
Work on the alarm system
Contact a CITROËN dealer or a qualified 
workshop.
Locking the vehicle with full 
alarm system
Activation
► Switch off the ignition and exit the vehicle.
►  Lock or deadlock the vehicle using the 
remote control or by pressing on the driver's 
door handle.
When the monitoring system is active, the red 
indicator lamp in the button flashes once per 
second and the direction indicators come on for 
about 2 seconds.
The exterior perimeter monitoring is activated 
after 5 seconds and the interior volumetric and 
anti-tilt monitoring after 45 seconds.
The alarm does not activate when  locking automatically from a distance.
If an opening (door, boot or bonnet) is not 
properly closed, the vehicle is not locked, 
but the exterior perimeter monitoring will be 
activated after 45 seconds, at the same time 
as the interior volumetric monitoring.
Sunroof
If the sunroof is open, the vehicle will 
be locked with exterior perimeter monitoring 
activated but without interior volumetric or 
anti-tilt monitoring.
Deactivation
► Press one of the remote control unlocking 
buttons:
Short press. 
Long press. 
or
►
 
Unlock the vehicle by pressing the driver
 ’s 
door handle.
The monitoring system is deactivated: the 
indicator lamp in the button goes off and the 
direction indicators flash for about 2 seconds.
After unlocking using the remote 
control
If the vehicle automatically locks itself again 
(as happens if a door or the boot is not 
opened within 30 seconds of unlocking), the 
monitoring system is automatically activated.   
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Access
2Locking the vehicle 
with exterior perimeter 
monitoring only
Deactivate the interior volumetric monitoring to 
avoid the unwanted triggering of the  alarm,   in 
certain cases such as:
–
 
Slightly open window
 .
–
 
W
 ashing the vehicle.
–
 
Changing a wheel.
–
 
T
 owing the vehicle.
–
 
T
 ransport on a ship or ferry.
Deactivating the interior volumetric 
and anti-tilt monitoring
► Switch off the ignition and within 10 seconds 
press the alarm button until its red indicator lamp 
is on fixed.
►
 
Get out of the vehicle.
►
 
Immediately lock the vehicle using the remote 
control or the Keyless Entry and Starting system.
Only the exterior perimeter monitoring is 
activated; the button's red indicator lamp flashes 
once every second.
To take effect, this deactivation must be  carried out after each time the ignition is 
switched off.
Reactivating the interior volumetric 
and anti-tilt monitoring
► Deactivate the exterior perimeter monitoring 
by unlocking the vehicle using the remote control 
or the Keyless Entry and Starting system.
The indicator lamp in the button goes off.
►
 
Reactivate all monitoring by locking the 
vehicle using the remote control or the Keyless 
Entry and Starting system.
The red indicator lamp in the button once again 
flashes every second.
Triggering of the alarm
This is indicated by sounding of the siren 
and flashing of the direction indicators for 30 
seconds.
Depending on the country of sale, certain 
monitoring functions remain active until the alarm 
has been triggered eleven times consecutively.
When the vehicle is unlocked using the remote 
control or the Keyless Entry and Starting system, 
rapid flashing of the red indicator lamp in the 
button informs you that the alarm was triggered 
during your absence. When the ignition is 
switched on, this flashing stops.
Failure of the remote control
To deactivate the monitoring functions:
►  Unlock the vehicle using the key in the front 
left-hand door lock.
►
 
Open the door; the alarm is triggered. ►
 
Switch on the ignition; this stops the alarm. 
The indicator lamp in the button goes off.
Locking the vehicle without 
activating the alarm
► Lock the vehicle using the key (built-in the 
remote control) in the front left-hand door lock.
Automatic activation
(Depending on version)
The system is activated automatically 2 minutes 
after the last door or the boot is closed.
►
 
T
 o avoid triggering the alarm on entering the 
vehicle, first press the unlocking button on the 
remote control or unlock the vehicle using the 
“Keyless Entry and Starting” system.
Malfunction
When the ignition is switched on, the fixed 
lighting of the red indicator lamp in the button 
indicates a system malfunction.
Have it checked by a CITROËN dealer or a 
qualified workshop.   
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Ease of use and comfort
3Interior rear view mirror
Equipped with an anti-dazzle system, which 
darkens the mirror glass and reduces the 
nuisance to the driver caused by the sun, 
headlamps of other vehicles, etc.
Manual model
Day/night position 
 
► Pull the lever to change to the anti-dazzle 
"night” position.
►
 
Push the lever to change to the normal "day" 
position.
Adjustment
►
 
Set the mirror to the normal “day” position.
Automatic "electrochrome" model 
 
The electrochrome system uses a sensor that 
detects the level of exterior brightness and that 
coming from the rear of the vehicle, in order to 
automatically and gradually switch between day 
and night usage.
To ensure optimum visibility while manoeuvring, the mirror automatically 
brightens when reverse gear is engaged.
The system is deactivated if the load in the 
boot exceeds the height of the load space 
cover or if the load space cover has items 
placed on it.
Rear bench seat
Bench seat with fixed cushions and split folding 
backrests (2/3-1/3) to adapt the boot load space.
Rear head restraints 
 
They have two positions:
–  A high position , for when the seat is in use:
►
 
Pull the head restraint fully up.
– 
A low position , for stowing, when the seat is 
not in use: ►
 
Press the lug 
 A to release the head 
restraint and push it down.
The rear head restraints can be removed.
Removing a head restraint
► Release the backrest using control  1 .
►  T ilt the backrest slightly forwards.
►
 
Pull the head restraint fully up.
►
 
Press the lug 
 A to release the head restraint 
and remove it completely.
Refitting a head restraint
► Insert the head restraint rods into the guides 
in the corresponding backrest.
►
 
Push the head restraint fully down.
►
 
Press the lug 
 A to release the head restraint 
and push it down.
Never drive with passengers seated at 
the rear when the head restraints are 
removed; the head restraints should be in 
place and in the high position.
The head restraint for the centre seat 
and those for the outer seats are not 
interchangeable.
Folding the backrests
Manoeuvring the backrests should only 
be done when the vehicle is stationary.   
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Ease of use and comfort
First steps:
► Lower the head restraints.
►
 
If necessary
 , move the front seats forward.
►
 
Check 
 that no person or object might interfere 
with the folding of the backrests (e.g.
  clothing, 
luggage).
►
 
Check that the seat belts are free, not 
engaged in the buckles. Release them so that 
the backrest can be moved.
Folding from the passenger compartment 
 
► Press the backrest release grip  1 .
►  Guide the backrest  2 down to the horizontal 
position.
When the backrest is released, the red 
indicator in the release grip is visible.
Folding from the boot (depending on 
version)
 
 
► Pull the backrest release lever  3  towards you.
The backrest 2 folds fully onto the cushion.
Repositioning the backrests
First check that the outer seat belts are 
lying vertically flat alongside the backrest 
latching rings.
 
 
► Put the backrest  2 in the upright position and 
push it firmly to latch it home.
►
 
Check that the red indicator is no longer 
visible in the release grip  1
.
►
 
Ensure that the outer seat belts were not 
trapped during the operation.
Please note: an incorrectly latched 
backrest compromises the safety of 
passengers in the event of sudden braking or 
an accident.
The contents of the boot may be thrown 
forwards - risk of serious injury!
Courtesy buttons
These buttons are used to move the passenger 
seat forward from the rear bench seat or to 
adjust the angle of the backrest.
 
 
► Press the front or rear of the button  1 to move 
the passenger seat forwards or backwards until 
the desired position.   
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Ease of use and comfort
3► Press the button 2 and tilt the backrest 
forwards or backwards to obtain the desired 
angle. 
Heating and Ventilation
Air intake
The air circulating in the passenger compartment 
is filtered and originates either from the 
exterior, via the grille located at the base of the 
windscreen, or from the inside in air recirculation 
mode.
Controls
The controls are accessible through the  Climate touch screen application and are 
also grouped on the centre console panel.
Air distribution 
 
1. Windscreen demisting/defrosting vents
2. Front side window demisting/defrosting vents
3. Adjustable and closable side air vents
4. Adjustable and closable central air vents
5. Air outlets to the front footwells
6. Air outlets to the rear footwells
7. Adjustable and closable air vents
Advice
Using the ventilation and air 
conditioning system
►
 
T
o ensure that air is distributed evenly, 
keep the external air intake grilles at the base 
of the windscreen, the nozzles, the vents, the 
air outlets and the air extractor in the boot 
free from obstructions.
►
 
Do not cover the sunshine sensor located 
on the dashboard; this sensor is used to 
regulate the automatic air conditioning 
system.
►
 
Operate the air conditioning system for at 
least 5 to 10 minutes once or twice a month to 
keep it in good working order
.
►
 
If the system does not produce cold air
 , 
switch it off and contact a CITROËN dealer or 
a qualified workshop.
When towing a large load on a steep gradient 
in high temperatures, switching off the air 
conditioning increases the available engine 
power, enhancing the towing capacity.
Avoid driving for too long with the  ventilation off or with prolonged operation 
of interior air recirculation. Risk of misting and 
deterioration of the air quality!
If the interior temperature is very high 
after the vehicle has stood for a long 
time in the sunshine, air the passenger 
compartment for a few moments.
Put the air flow control at a setting high 
enough to quickly change the air in the 
passenger compartment.
Condensation created by the air 
conditioning results in a discharge of 
water underneath the vehicle. This is perfectly 
normal.
Servicing the ventilation and air 
conditioning system
►
 
Ensure that the passenger compartment 
filter is in good condition and have the filter 
elements replaced regularly
.
We recommend using a composite passenger 
compartment filter. Thanks to its special active 
additive, this type of filter helps to purify the 
air breathed by the occupants and keep the 
passenger compartment clean (by reducing 
allergic symptoms, unpleasant odours and 
greasy deposits).
►
 
T
o ensure correct operation of the 
air conditioning system, have it checked    
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Ease of use and comfort
Rear fittings
USB sockets 
 
Depending on version, the rear of the centre 
console is fitted with one or two USB sockets. 
Each USB socket is used to power or recharge a 
portable device.
The left USB socket also allows multimedia 
data to be exchanged with the audio system 
(depending on country of sale).
Rear armrest 
 
The armrest incorporates two cup holders.
The cup holders have a removable reducer to 
be used depending on the diameter of the cans 
and cups.
The pen holder can also hold a smartphone.
Ski flap
Device for storing and transporting long objects.
Opening
► With the rear armrest lowered, open the flap 
by pulling its handle downwards.
 
 
► Load the objects from inside the boot.
Shark fin antenna 
 
A ventilation grille is present at the rear of the 
roof, inside the vehicle, for cooling the shark fin 
antenna.
Any ventilation noise produced, with the ignition 
on or the engine running, is completely normal.   
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Ease of use and comfort
3Boot fittings 
 
1.Load space cover shelf or roller
2. Boot lamp
3. 12
  V socket
4. Stowing rings
5. Rigid boot floor or hinged boot carpet 
(Rechargeable hybrid)
Storage well
6. Side storage well
The stowing rings are designed to secure 
luggage using different types of retaining 
nets or suitable straps.
For more information, contact a CITROËN 
dealer or a qualified workshop.
Load space cover shelf 
 
To remove the load space cover shelf:
►  unhook the two cords,
►
 
gently lift the shelf, then remove it.
When sharp deceleration occurs, objects 
placed on the load space cover shelf can 
turn into projectiles.
Load space cover roller
Installation 
 
► Unwind the roller until it reaches the boot 
pillars.
►
 
Insert the guides of the roller into the hooks 
on the boot pillars.
Winding
► Unclip the two sides at the same time.
►  Hold the two roller guides and guide the roller 
as it reels in properly
.   
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Ease of use and comfort
Removal 
 
► Compress the right side of the roller and lift it 
on the right then on the left.
Depending on version, the roller can be 
stored under the boot floor.
12 V accessory socket
► To  connect a 12   V accessory (maximum 
power: 120   W), lift the cover and plug in a 
suitable adaptor.
►
 
Switch on the ignition.
The connection of an electrical device not approved by CITROËN, such as a 
USB charger, may adversely affect the 
operation of vehicle electrical systems, 
causing faults such as poor radio reception or 
interference with displays in the screens.
Storage well 
 
To  access it:
►  Open the boot.
►
 
Lift the boot carpet by pulling its handle.
Depending on version, it includes:
–
 
A
  temporary puncture repair kit with the tool 
kit.
–
 
A
  spare wheel with the tool kit.
–
 
The traction battery charging cable 
(Rechargeable hybrid).
Boot lamp
It comes on automatically when the boot is 
opened and goes off automatically when the 
boot is closed.
The lighting time varies according to the 
circumstances:
–
 
When the ignition is off, approximately 10 
minutes.
–
 
In energy saving mode, approximately 30 
seconds.
–
 
With the engine running, unlimited.   
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Lighting and visibility
4Headlamp beam height 
adjustment
 
 
 
 
To avoid dazzling other road users, the height 
of the headlamp beams must be adjusted 
according to the load in the vehicle.
0 (Initial setting) Driver only or driver + front passenger
1 5 people
2 5 people + load in the boot
3 Driver only + load in the boot
4 5 6 Not used
Automatic illumination of 
lamps
With the lighting control stalk in the “ AUTO” 
position and if a low level of exterior brightness 
is detected by the rain/sunshine sensor, the 
sidelamps and dipped beam headlamps are 
switched on automatically, without any action on 
the part of the driver. They may also come on if 
rain is detected, at the same time as automatic 
operation of the windscreen wipers.
As soon as the brightness returns to a sufficient 
level or after the windscreen wipers are switched 
off, the lamps are switched off automatically.
Malfunction
In the event of a malfunction of the rain/
sunshine sensor, the vehicle’s lamps 
come on and this warning lamp is displayed on 
the instrument panel, accompanied by an 
audible signal and/or the display of a message.
Have it checked by a CITROËN dealer or a 
qualified workshop.
Do not cover the rain/sunshine sensor 
located at the top centre of the 
windscreen behind the interior rear view 
mirror; the associated functions would no 
longer be controlled.
In fog or snow, the rain/sunshine sensor 
may detect sufficient light. For this 
reason, the lighting will not come on 
automatically.
The inner surface of the windscreen may  become misted up and affect the proper 
operation of the rain/sunshine sensor.
In humid and cold weather, demist the 
windscreen regularly.
Guide-me-home and 
welcome lighting
Guide-me-home lighting
Automatic
With the ring of the lighting control stalk in the 
"AUTO” position and when the light is poor, the 
dipped beam headlamps come on automatically 
when the ignition is switched off.
You can activate/deactivate and adjust  the duration of the guide-me-home 
lighting in the  Settings
  > Vehicle touch screen 
application.
Manual 
 
► With the ignition off, pull the lighting control 
stalk towards you ("headlamp flash") to activate/
deactivate the function.
Manual guide-me-home lighting goes off 
automatically after a period of time.
Welcome lighting
This system automatically switches on:   
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Driving
For versions fitted with Proximity Keyless 
Entry and Start, the electronic key is also 
detected in the boot.
If there is still a problem, refer to the "Key 
not detected - Back-up starting or Back-up 
switch-off" section.
Starting
► Select mode P or N on the automatic 
gearbox, then depress the brake pedal.
 
 
► Press the " START/STOP" button while 
maintaining pressure on the pedal until the 
engine starts.
In all circumstances, if one of the starting 
conditions is not met, a message is displayed.
In some circumstances, a message indicates 
that it is necessary to turn the steering wheel 
while pressing the " START/STOP" button to 
assist unlocking of the steering column.
Petrol engines
With Petrol engines, after a cold start, 
pre-heating the catalytic converter can cause 
noticeable engine vibrations, for anything up 
to 2 minutes (accelerated idle speed).
Starting rechargeable hybrid 
vehicles
► Fully depress the brake pedal and press 
the  START/STOP button for approximately 2 
seconds.
► Keep you r foot on the pedal until this 
indicator lamp comes on, indicating the 
activation of the rechargeable hybrid system 
(confirmed by an audible signal).
To exit Park mode, wait for the READY  indicator lamp to come on.
By default, the system starts in Electric mode.
Depending on certain parameters (battery 
charge level or outside temperature), the system 
determines whether it is necessary to start the 
petrol engine.
It is possible to change the driving mode at any 
time using the mode selector.
When the vehicle starts in electric mode, 
it makes no noise. 
Pay particular attention to pedestrians and 
cyclists who may not hear the vehicle coming 
despite the pedestrian horn.
Switching off
► Deactivate cruise control alone or Highway 
Driver  Assist (depending on version).
►
 
Immobilise the vehicle using the parking 
brake.
►
 
Select mode
   P   on the automatic gearbox.
► Press the "START/STOP" button.
►  For rechargeable hybrid vehicles, before 
leaving the vehicle, check that the  READY
 
indicator lamp is switched off.
The automatic gearbox locks in mode  P.
If the vehicle is not immobilised, the 
engine will not stop.
With the engine off, the braking and 
steering assistance systems are also cut 
off - risk of loss of control of the vehicle!
Never leave your vehicle with the 
electronic key still inside.
Switching on the ignition 
without starting the engine
With the electronic key in the passenger 
compartment, pressing the " START/STOP" 
button, without depressing any of the pedals , 
allows the ignition to be switched on without 
starting the engine.
►
 
Press this button again to switch off the 
ignition and allow the vehicle to be locked.
Key not detected
Back-up starting
A back-up reader is fitted to the steering column, 
to enable the engine to be started if the system