2023 CITROEN C4 brake light

2
Contents
 ■
Overview
 ■
Eco-driving
1Dashboard instrumentsDriver information 10
Instrument panels 10
Head-up display 12
Warning and indicator lamps 13
Indicators 19
Manual test 24
Total distance recorder 25
Lighting dimmer 25
Trip computer 25
5-inch touch screen 27
10-inch touch screen 27
Remotely operable additional functions
(Electric)
30
2AccessElectronic key with remote control function and
built-in key 32
Proximity Keyless Entry and Start 34
Central locking 36
Back-up procedures 37
Doors 39
Boot 40
Alarm 40
Electric windows 42
Sunroof 43
3Ease of use and comfortFront seats 45
Steering wheel adjustment 47
Heated steering wheel 47
Mirrors 48
Rear bench seat 49
Heating and Ventilation 51
Manual air conditioning 52
Dual-zone automatic air conditioning 53
Front demisting - defrosting 57
Heated windscreen 58
Rear screen demisting/defrosting 58
Temperature pre-conditioning (Electric) 58
Interior fittings 59
Courtesy lamps 62
Interior ambient lighting 63
Boot fittings 63
4Lighting and visibilityLighting control stalk 65
Direction indicators 66
Automatic illumination of headlamps 67
Headlamp beam height adjustment 67
Guide-me-home and welcome lighting 67
Automatic lighting systems - General
recommendations
68
Automatic headlamp dipping 69
Cornering lighting 70
Wiper control stalk 70
Intermittent wipers 71
Automatic wipers 72
Changing a wiper blade 73
5SafetyGeneral safety recommendations 74
Hazard warning lamps 74
Horn 75
Pedestrian horn (Electric) 75
Emergency or assistance 75
Electronic stability control (ESC) 77
Seat belts 79
Airbags 82
Child seats 84
Deactivating the front passenger airbag 86
ISOFIX child seats 87
i-Size child seats 89
Installing child seats 90
Child lock 92
6DrivingDriving recommendations 93
Starting / Switching off the engine with the key 95
Starting/Switching off the engine with Keyless
Entry and Start
96
Manual parking brake 98
Electric parking brake 99
6-speed manual gearbox 101
Automatic gearbox 101
Drive selector (Electric) 103
Driving modes 104
Hill start assist 105
Gear shift indicator 106
Stop & Start 106
Tyre under-inflation detection 108
Driving and manoeuvring aids - General
recommendations
109
Shortcuts for driving aids 111
Road signs recognition 111
Speed limiter 11 5
Cruise control - Specific recommendations 11 6
Cruise control 11 7
Highway Driver Assist 11 8
Adaptive cruise control 11 9
Lane positioning assist 123
Lane keeping assist 128
Blind spot monitoring 131
Active Safety Brake with Collision Risk Alert
and Intelligent emergency braking assistance
132
Distraction detection 136

6
Overview
– Domestic charging in mode 2 using a
domestic socket and associated charging cable
7
.
–

Accelerated charging in mode 3 using an
accelerated charging unit (W

allbox).
–

Superfast charging in mode 4 using a fast
public charger

.
The 400
V traction battery 2 uses Lithium-Ion
technology. It stores and supplies the energy
required for the operation of the electric motor,
air conditioning and heating. Its charge level is
represented by an indicator and a reserve power
warning lamp on the instrument panel.
The 12
V accessory battery 3 powers the
vehicle’s conventional electrical system. It is
recharged automatically by the traction battery
via the on-board charger.
The heat pump
4 provides passenger
compartment heating and regulates traction
battery and on-board charger cooling.
The on-board charger 5 manages the domestic
charging
(mode 2) and accelerated charging
(mode 3) of the traction battery as well as the
recharging of the 12
V accessory battery.
The electric motor
6 provides propulsion in
accordance with the selected driving mode and
driving conditions. It recovers energy during
vehicle braking and deceleration
phases.
Labels
“Ease of use and comfort - Rear bench seat -
Rear head restraints” section:


"Ease of use and comfort - Front fittings -
Wireless smartphone charger" section:


"Lighting and visibility - Exterior lighting
control stalk" and "In the event of a
breakdown - Changing a bulb" sections:


"Safety - Child seats - Deactivating the front
passenger airbag" section:




"Safety - ISOFIX mountings" section:
i-SizeTOP TETHER
"Driving - Electric parking brake" section:

"Driving - Stop & Start" section:

"Practical information - Compatibility of
fuels" section:




"Practical information - Charging system
(Electric)" section:








"Practical information - Charging the traction
battery (Electric)" section:


"Practical information - Bonnet" section:

"Practical information - Checking levels -
Engine coolant" section:

15
Dashboard instruments
1Fixed, accompanied by the message
"Parking brake fault".
Automatic release of the electric parking brake is
unavailable.
Carry out (2).
Service warning lamp fixed and
service spanner flashing then
fixed.
The servicing interval has been exceeded.
The vehicle must be serviced as soon as
possible.
Only with BlueHDi Diesel engines.
BrakingFixed.
A minor fault with the braking system has
been detected.
Drive carefully.
Carry out (3).
Malfunction (with electric parking brake)Fixed, accompanied by the
message "Parking brake fault".
The vehicle cannot be immobilised with the
engine running.
If manual application and release commands are
not working, the electric parking brake control is
faulty.
The automatic functions must be used at all
times and are automatically reactivated in the
event of a fault with the control.
Carry out (2).
Fixed, accompanied by the
message "Parking brake
fault".
The electric parking brake is faulty: manual and
automatic functions may not be working.
When stationary, to immobilise the vehicle:
►

Pull the electric parking brake control and
hold it for approximately 7 to 15 seconds, until
the indicator lamp lights up on the instrument
panel.
If this procedure does not work, secure the
vehicle:
►


Park on a level surface.
►


With a manual gearbox, engage a gear
.
►

With an automatic gearbox or drive selector
,
select

P, then place the supplied chock against
one of the wheels.
Then carry out (2).
Automatic functions deactivated (electric
parking brake)
Fixed.
The "automatic application" (on switching
off the engine) and "automatic release" (on
acceleration) functions are deactivated.
If automatic application/release is no longer
possible:
►

Start the engine.
►


Use the control to apply the electric parking
brake.
►


T

ake your foot fully off the brake pedal.
►

Hold the control pressed in the release
direction for between 10 and 15

seconds.
►

Release the control. ►


Depress and hold the brake pedal.
►

Pull the control in the application direction for
2
seconds.
►
Release the control and the brake pedal.
Anti-lock braking system (ABS)Fixed.
The anti-lock braking system has a fault.
The vehicle retains conventional braking.
Drive carefully at moderate speed, then carry
out (3).
Power steeringFixed.
The power steering has a fault.
Drive carefully at moderate speed, then carry
out (3).
Engine self-diagnostic system (Petrol or
Diesel)
Flashing.
The engine management system has a
fault.
There is a risk that the catalytic converter will be
destroyed.
You must carry out (2).
Fixed.
The emissions control system has a fault.
The warning lamp should go off when the engine
is started.
Carry out (3) without delay.

19
Dashboard instruments
1Flashing temporarily.
STOP mode is momentarily unavailable
or START mode is automatically triggered.
For more information, refer to the Driving
section.
Vehicle ready to drive (Electric)Fixed, accompanied by an audible signal
when it comes on.
The vehicle is ready to drive and the thermal
comfort systems are available.
The indicator lamp goes out upon reaching a
speed of approximately 3 mph (5
km/h) and
lights up again when the vehicle stops moving.
The lamp will go out when you switch off the
motor and exit the vehicle.
Seat occupied/Seat belt fastenedFixed.
With the ignition on, the driver or a
passenger has fastened their seat belt.
Park AssistFixed.
The function is active.
For more information, refer to the Driving
section.
Lane positioning assistFixed.
The function has been activated.
All conditions have been met: the system is
operating.
For more information, refer to the Driving
section.
Direction indicatorsFlashing with audible signal.
The direction indicators are on.
SidelampsFixed.
The lamps are on.
Dipped beam headlampsFixed.
The lamps are on.
Automatic headlamp dippingFixed.
The function has been activated
via the touch screen.
The lighting control stalk ring is in the “ AUTO”
position.
For more information, refer to the Lighting and
visibility section.
Front foglampsFixed.
The front foglamps are on.
Blue warning/indicator lamps
Main beam headlamps
Fixed.
The lamps are on.
Black/white warning lamps
Foot on the clutch (Petrol or Diesel)
Fixed.
Stop & Start: the change to START mode
is rejected because the clutch pedal is not fully
depressed. Fully depress the clutch pedal.
Foot on the brakeFixed.
Insufficient or no pressure on the brake
pedal.
Fuel filter (Diesel)Fixed.
The Diesel fuel filter contains water.
Carry out (2) without delay. Risk of damaging the
fuel injection system!
Indicators
Service indicator
The servicing information is expressed in terms
of distance (miles or kilometres) and time
(months or days).
The alert is given at whichever of these two
terms is reached first.
The servicing information is displayed in the
instrument panel. Depending on the version of
the vehicle:
–

The distance recorder display line indicates
the distance remaining before the next service
is due, or the distance travelled since it was due
preceded by the "-" sign.
–


An alert message indicates the distance
remaining, as well as the period before the next
service is due or how long it is overdue.

78
Safety
ABS prevents wheel locking in the event of
emergency braking.
Electronic brake force distribution (EBFD)
manages overall braking pressure on each
individual wheel.
►
When braking in an emergency
, depress
the pedal very firmly and maintain this
pressure.
Normal operation of the ABS may make
itself felt by slight vibrations of the brake
pedal.
The fixed illumination of this warning lamp signals that there is a fault with the ABS.
The vehicle retains conventional braking. Drive
carefully at a moderate speed.
Have it checked by a CITROËN dealer or a
qualified workshop.
This warning lamp, when lit together with the STOP and ABS warning lamps,
accompanied by a message and an audible
signal, indicates an EBFD malfunction.
You must stop the vehicle.
Stop as soon as it is safe to do so and switch off
the ignition.
Contact a CITROËN dealer or a qualified
workshop.
When changing wheels (tyres and rims),
ensure that these are approved for your
vehicle.
After an impact
Have it checked by a CITROËN dealer or
a qualified workshop.
Post Collision Safety Brake
(PCSB)
If an accident is detected, the vehicle initiates
automatic post collision braking. The goal of this
system is to reduce the risk of further collisions if
the driver does not react.
The system is not operational if the capability of
the vehicle to trigger and execute the automatic
post collision braking is not available, as it can
occur in destructive accidents or in other specific
accident scenarios.
It is possible to override the automatic braking by
pressing the brake pedal or accelerator pedal.
Operating conditions
The system operates, if the following conditions
are met:
–

Airbags or pyrotechnic seat belt pretensioners
have been deployed by the collision.
–


Braking systems and electric functions remain
continuously operational during and after
collision.
–


Driver has not depressed the brake or
accelerator pedal.
Malfunction
In the event of a
malfunction, one of these warning lamps will come on fixed on the
instrument panel, accompanied by the Service
warning lamp, the display of a message and an
audible signal.
Have it checked by a CITROËN dealer or a
qualified workshop.
Emergency braking
assistance (EBA)
This system reduces the emergency stopping
distance, by optimising the braking pressure.
It is triggered in relation to the speed at which
the brake pedal is depressed. The effect of this
is a reduction in the resistance of the pedal and
an increase in braking efficiency.
Anti-slip regulation (ASR)
/ Dynamic stability control
(DSC)
Anti-slip regulation (or traction control) optimises
traction by using engine braking and by applying
the brakes on the driving wheels to avoid one
or more wheels spinning. It also enhances the
vehicle's directional stability.
If there is a difference between the vehicle’s
trajectory and the path desired by the driver, the
dynamic stability control system automatically
uses engine braking and the brakes on one or
more wheels to return the vehicle to the desired
path, within the limits of the laws of physics.

93
Driving
6Driving recommendations
► Observe the driving regulations and remain
vigilant whatever the traffic conditions.
►

Monitor your environment and keep your
hands on the wheel to be able to react to
anything that may happen any time.
►


Drive smoothly
, anticipate the need for
braking and maintain a longer safety distance,
especially in bad weather.
►

Stop the vehicle before performing operations
that require sustained attention (e.g.

settings).
►

During long trips, take a break every 2 hours.
Important!
Never leave the engine running in a
closed space without sufficient
ventilation. Internal combustion engines emit
toxic exhaust gases such as carbon
monoxide. Danger of poisoning and death!
In very severe wintry conditions
(temperature below -23°C), let the engine
run for 4 minutes before moving off, to ensure
the correct operation and durability of the
mechanical components of your vehicle
(engine and gearbox).
Never drive with the parking brake
applied . Risk of overheating and
damaging the braking system!
Never park the vehicle and never
leave the engine running on a
flammable surface (e.g.
dry grass, dead
leaves).The vehicle exhaust system is very
hot, even several minutes after the engine
stops. Risk of fire!
Never drive on surfaces covered with
vegetation (e.g. tall grass,
accumulated dead leaves, crops, debris)
such as a field, a country lane overgrown
with bushes or a grassy verge.
This vegetation could come into contact with
the vehicle's exhaust system
or other systems
which are very hot. Risk of fire!
Make sure you do not leave any item in
the passenger compartment which could
act like a magnifying glass under the effect of
the sun's rays and cause a fire. Risk of fire or
damage to interior surfaces!
Never leave the vehicle unattended,
with the engine running . If you have to
leave your vehicle with the engine running,
apply the parking brake and put the gearbox
into neutral or position N or P (depending on
the type of gearbox).
Never leave children inside the vehicle
unsupervised.
On flooded roads
We strongly advise against driving on flooded
roads, as this could cause serious damage to the
engine or gearbox, as well as to your vehicle's
electrical systems.


If the vehicle absolutely must drive through a
flooded section of road:
►

Check that the depth of the water does not
exceed 15

cm, taking account of waves that
might be generated by other users.
►

Deactivate the Stop & Start function.
►


Drive as slowly as possible without stalling. In
all cases, do not exceed 6 mph (10

km/h).
►

Do not stop and do not switch off the engine.
On leaving the flooded road, as soon as safety
conditions allow

, make several light brake
applications to dry the brake discs and pads.
If in doubt about the state of your vehicle,
contact a CITROËN dealer or a qualified
workshop.

94
Driving
Noise (Electric)
On the outside
Due to the vehicle’s quiet operation when
driving, the driver must pay particular attention.
When manoeuvring, the driver must always
check the vehicle's immediate surroundings.
At speeds of up to 19 mph (30 km/h), the
pedestrian horn warns other road users of the
vehicle’s presence.
Cooling the traction battery
The cooling fan comes on during
charging to cool the on-board charger and the
traction battery.
On the inside
During use, you may hear certain perfectly
normal noises specific to electric vehicles, such
as:
–

T
raction battery relay when starting.
–

V
acuum pump when braking.
–

V
ehicle tyres or aerodynamics when driving.
–

Jolting and knocking noise during hill starts.
Towing
Driving with a trailer places greater
demands on the towing vehicle and
particular care must be taken.
Do not exceed the maximum towable
weights.
At altitude: reduce the maximum load by
10% per 1,000 metres of altitude; the lower
air density at high altitudes decreases engine
performance.
New vehicle: do not tow a trailer until the
vehicle has driven at least 620 miles
(1,000 kilometres).
If the outside temperature is high, let the
engine idle for 1 to 2 minutes after the
vehicle comes to a stop, to help it to cool.
Before setting off
Nose weight
► Distribute the load in the trailer so that the
heaviest items are as close as possible to the
axle and the nose weight (at the point where it
joins your vehicle) approaches the maximum
permitted without exceeding it.
Tyres
► Check the tyre pressures of the towing
vehicle and of the trailer , observing the
recommended pressures.
Lighting
► Check the electrical signalling on the trailer
and the headlamp beam height of your vehicle.
If a genuine CITROËN towing device is
used, the rear parking sensors will be
deactivated automatically to avoid the audible
signal.
When driving
Cooling
Towing a trailer uphill causes the coolant
temperature to increase. The maximum towable
load depends on the gradient and the exterior
temperature. The fan’s cooling capacity does not
increase with engine speed.
►

Reduce speed and lower the engine speed to
limit the amount of heating produced.
►


Pay constant attention to the coolant
temperature.
If this warning lamp and the STOP
warning lamp come on, stop the
vehicle and switch off the engine as soon as
possible.
Brakes
Using the engine brake is recommended to limit
the overheating of the brakes. Braking distances
are increased when towing a trailer.
Side wind
Bear in mind that the vehicle will be more
susceptible to wind when towing.

98
Driving
appears in the instrument panel when closing a
door or trying to switch off the engine.
►
T
o confirm the instruction to switch off the
engine, press the " START/STOP" button for
approximately 5
seconds.
In the event of a fault with the electronic key,
contact a CITROËN dealer or a qualified
workshop.
Emergency switch-off
In case of emergency only, the engine can be
switched off without conditions (even when
driving).
►

Press the "
START/STOP" button for about
5
seconds.
In this case, the steering column locks as soon
as the vehicle stops.
Starting/Switching off the
electric motor
Starting
The drive selector must be in mode P.
► If using a remote control key , depress the
brake pedal and turn the key until it reaches
position 3 (Start).
►

If using
Keyless Entry and Start, depress the
brake pedal and briefly press the "START/STOP"
button.
►

Keep your foot on the brake pedal until the
READY

indicator lamp comes on and an audible
signal is emitted, indicating that the vehicle is
ready to drive.
►
With your foot on the brake, select mode
D
or R.
►

Release the brake pedal, then accelerate.
On starting, the instrument panel lights up and
the power indicator cursor moves to the "neutral"
position.

The steering column automatically
unlocks (you may hear a sound and feel the
steering wheel move).
Switching off
► If using a remote control key , turn the key
fully to position 1 (Stop).
►

If using Keyless Entry and Start, press the
"

START/STOP" button.
Before exiting the vehicle, check that:
–

The drive selector is in mode P

.
–
The READY indicator lamp is off.
The drive selector moves automatically
to mode P when the motor is switched off
or when the driver's door is opened.
If the driver's door is opened while the
required conditions for switching off are
not met, an audible signal is emitted,
accompanied by the display of a warning
message.
For the procedures for switching on the
ignition without starting the engine and
those for back-up starting/switching off using
the Keyless Entry and Start system, refer to
the Starting/Switching off the engine
using
Keyless Entry and Start section.
Manual parking brake
Release

► Pull the parking brake lever up slightly , press
the release button, then lower the lever fully.
/ When driving the vehicle, if this
warning lamp and the STOP
warning lamp come on, accompanied by an
audible signal and the display of a message, this
means that the parking brake is still applied or
has not been fully released.
Application
► Pull the parking brake lever up to immobilise
the vehicle.
When parking on a slope, turn the
wheels against the kerb, apply the
parking brake, engage a gear and switch off
the ignition.