air filter CITROEN C4 AIRCROSS DAG 2021 Handbook (in English)

6
Eco-driving
Eco-driving
Eco-driving refers to a range of everyday
practices that allow the motorist to optimise their
fuel consumption and CO
2emissions.
Optimise your use of the gearbox
With a manual gearbox, move off gently and
change up promptly. While accelerating, change
up early.
With an automatic gearbox, favour automatic
mode and avoid pressing the accelerator pedal
heavily or suddenly.
The gear efficiency indicator prompts you to
engage the most suitable gear: whenever this
indication is displayed on the instrument panel,
follow it straight away.
With an automatic gearbox, this indicator
appears only in manual mode.
Drive smoothly
Maintain a safe distance between vehicles, use
engine braking rather than the brake pedal and
press the accelerator gradually. These attitudes
help to save fuel, reduce CO
2 emissions and
decrease general traffic noise.
If the vehicle has the steering-mounted
"CRUISE" control, use cruise control at speeds
above 25 mph (40 km/h) when the traffic is flowing well.
Use electrical equipment wisely
Before moving off, if the passenger compartment
is too warm, ventilate it by opening the windows
and air vents before using the air conditioning.
At speeds above 31 mph (50 km/h), close the windows and leave the air vents open.
Consider using equipment that can help keep
the temperature in the passenger compartment
down (sunroof blind and window blinds, etc.).
Unless automatically regulated, switch off the air
conditioning as soon as the desired temperature
has been reached.
Switch off the demisting and defrosting functions,
if they are not managed automatically.
Switch off the heated seat as soon as possible.
Switch off the headlamps and foglamps when
the visibility conditions do not require their use.
Avoid running the engine before moving off,
particularly in winter; your vehicle will warm up
much faster while driving.
As a passenger, avoid connecting your
multimedia devices (film, music, video game,
etc.) to help reduce consumption of electrical
energy, and hence fuel.
Disconnect all portable devices before leaving
the vehicle.
Limit the causes of excess consumption
Spread loads throughout the vehicle; place the
heaviest items in the boot, as close as possible
to the rear seats.
Limit the loads carried in the vehicle and
minimise wind resistance (roof bars, roof rack, bicycle carrier, trailer, etc.). Preferably, use a
roof box.
Remove roof bars and roof racks after use.
At the end of winter, remove snow tyres and refit
summer tyres.
Comply with servicing instructions
Check tyre pressures regularly, with the tyres
cold, referring to the label in the door aperture on
the driver's side.
Carry out this check in particular:
– before a long journey
.– at each change of season.– after a long period out of use.Do not overlook the spare wheel and, where
applicable, the tyres on your trailer or caravan.
Have your vehicle serviced regularly (engine oil,
oil filter, air filter, passenger compartment filter,
etc.) and observe the schedule of operations in
the manufacturer's service schedule.
With a BlueHDi Diesel engine, if the SCR system
is faulty, your vehicle will emit pollution. Visit
a CITROËN dealer or a qualified workshop
as soon as possible to restore your vehicle’s
nitrogen oxide emissions to regulatory
compliance.
When filling the fuel tank, do not continue after
the third nozzle cut-out, to avoid overflow.
You will only see the fuel consumption of your
new vehicle settle down to a consistent average
after the first 1,900 miles (3,000 kilometres).

10
Instruments
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) quickly.
Collision Risk Alert/Active Safety BrakeFlashing.The system activates and brakes the
vehicle momentarily so as to reduce the speed of
collision with the vehicle ahead.
Fixed, accompanied by a message and an audible signal.
The system has a fault.
Carry out (3).
Fixed, accompanied by the display of a message.
The system has been deactivated via the vehicle
configuration menu.
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).
Under-inflationFixed, accompanied by an audible signal and a message.
The pressure in one or more tyres is too low.
Check the pressure of the tyres as soon as
possible. Reinitialise the detection system after adjusting
the pressure.
Under-inflation warning lamp flashing then fixed and Service
warning lamp fixed.
The tyre pressure monitoring system is faulty.
Under-inflation detection is no longer monitored.
Check the tyre pressures as soon as possible
and carry out (3).
Dynamic stability control (DSC) / Anti-slip
regulation (ASR)
Fixed.The system is deactivated.
The DSC / ASR system is automatically
reactivated when the vehicle is restarted, and
from around 31 mph (50 km/h).Below 31 mph (50 km/h), it can be reactivated manually.Flashing.DSC/ASR regulation is activated in the
event of a loss of grip or trajectory.
Fixed.The DSC/ASR system has a fault.
Carry out (3).
AirbagsFixed.One of the airbags or seat belt
pyrotechnic pretensioners is faulty.
Carry out (3).
Front passenger airbag (OFF)Fixed.The front passenger airbag is deactivated. The control is in the "OFF
" position.
A "rearward facing" child seat can be installed,
unless there is a fault with the airbags (Airbags
warning lamp on).
Particle filter(Diesel)Fixed, accompanied by an audible signal and a message about the risk of particle
filter blockage.
The particle filter is starting to saturate.
As soon as the traffic conditions permit,
regenerate the filter by driving at a speed of at
least 37 mph (60 km/h) until the warning lamp goes off.Fixed, accompanied by an audible signal and a message signalling that the additive
level in the particle filter is too low.
The minimum level of the additive tank is
reached.
Quickly have the tank topped up: carry out (3)
Low fuel levelFixed, accompanied by an audible signal and a message.
When it first comes on, there remains
approximately 5 litres of fuel in the tank
(reserve).
Refuel without delay to avoid running out of fuel.
Never drive until completely empty, as
this could damage the emissions control and
injection systems.

42
Ease of use and comfort
► Turn the mirror towards the vehicle.
Electric folding
Depending on equipment, the mirrors can be
folded electrically, when the vehicle is parked.
► From the inside, with the ignition on, place control A in the
central position.
► Pull control A backwards.
► Lock the vehicle from the outside.
Electric unfolding
Door mirrors are unfolded electrically with the
remote control or the Keyless Entry and Starting
system when the vehicle is unlocked. Unless
folding was selected with control A, pull the
control backwards in the centre position.
Folding/unfolding during locking/
unlocking can be disabled. Contact a
CITROËN dealer or a qualified workshop.
If necessary, the mirrors can be folded
manually.
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,
headlights 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

This system automatically and progressively
transitions between day and night modes, using
a sensor that measures the light entering from
the rear of the vehicle.
To ensure optimum visibility during your manoeuvres, the mirror lightens
automatically when reverse gear is engaged.
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
Depending on version, the controls are
accessible in the " Air conditioning" touch
screen menu or are grouped together in the
control panel on the centre console.
The demisting/defrosting controls for the
windscreen and the rear screen are located
below the touch screen, or on the centre console
panel located below the audio system.
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
Advice
Using the ventilation and air
conditioning system
► To 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 perfect working order.
► If the system does not produce cold air, switch it off and contact a CITROËN dealer or
a qualified workshop.
When towing the maximum 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

43
Ease of use and comfort
33.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
Advice
Using the ventilation and air
conditioning system
► To 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 perfect working order.
► If the system does not produce cold air , switch it off and contact a CITROËN dealer or
a qualified workshop.
When towing the maximum 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).
► To ensure correct operation of the air conditioning system, have it checked
according to the recommendations in the
Maintenance and Warranty Guide.
Stop & Start
The heating and air conditioning systems
only operate when the engine is running.
Temporarily deactivate the Stop & Start
system to maintain a comfortable temperature
in the passenger compartment.
For more information on the Stop & Start,
refer to the corresponding section.
Heating/Manual air
conditioning


The heating only operates when the engine is
running.


The manual air conditioning operates when the
engine is running.
1. Recirculation of interior air
2. Temperature adjustment
3. Air distribution adjustment
4. Air flow adjustment
5. Air conditioning on/off

130
Practical information
► Remove the roof bars once they are no longer needed.
Maximum load, distributed over the roof
bars, for a loading height not exceeding
40 cm:
– without longitudinal bars: 50 kg,– with longitudinal bars: 45 kg.
As this value may change, please verify the
maximum load quoted on the note supplied
with the roof bars.
If the height exceeds 40 cm, adapt the
speed of the vehicle to the profile of the road
to avoid damaging the roof bars and the
mountings on the vehicle.
Be sure to refer to national legislation in order
to comply with the regulations for transporting
objects which are longer than the vehicle.
Bonnet
Stop & Start
Before doing anything under the bonnet,
you must switch off the ignition to avoid any
risk of injury resulting from an automatic
change to START mode.
The location of the interior bonnet release lever prevents the bonnet being
opened when the left-hand front door is
closed.
When the engine is hot, handle the
exterior safety catch and the bonnet stay
with care (risk of burns), using the protected
area.
When the bonnet is open, take care not to
damage the safety catch.
Do not open the bonnet under very windy
conditions.
Cooling of the engine when stopped
The engine cooling fan may start after
the engine has been switched off.
Take care with objects or clothing that
could be caught in the blades of the fan!
Opening


► Open the left-hand front door .
► Pull the interior release lever, located at the bottom of the door frame, towards you.

► Tilt the safety catch to the left and raise the bonnet.

► Unclip the stay from its housing and place it in the support slot to hold the bonnet open.
Closing
► Hold the bonnet and pull out the stay from the support slot.
► Clip the stay in its housing.► Lower the bonnet and release it near the end of its travel.► Pull on the bonnet to check that it is locked correctly.
Because of the presence of electrical
equipment under the bonnet, it is strongly
recommended that exposure to water (rain,
washing, etc.) be limited.
Engine compartment
The engine represented is an example given for
illustration purposes only.
The locations of the following elements may
vary:
– Air filter.– Engine oil dipstick.– Engine oil filler cap.– Priming pump.
* Depending on engine.

131
Practical information
7► Clip the stay in its housing.► Lower the bonnet and release it near the end of its travel.► Pull on the bonnet to check that it is locked correctly.
Because of the presence of electrical
equipment under the bonnet, it is strongly
recommended that exposure to water (rain,
washing, etc.) be limited.
Engine compartment
The engine represented is an example given for
illustration purposes only.
The locations of the following elements may
vary:
– Air filter.– Engine oil dipstick.– Engine oil filler cap.– Priming pump.
* Depending on engine.
Petrol engine

Diesel engine

1. Screenwash fluid reservoir
2. Engine coolant reservoir
3. Brake fluid reservoir
4. Battery
5. Remote earth point (-)
6. Fusebox
7. Air filter
8. Engine oil filler cap
9.Engine oil dipstick
10. Priming pump *
The Diesel fuel system operates under
very high pressure.
All work on this circuit must be carried out
only by a CITROËN dealer or a qualified
workshop.
Checking levels
Check all of the following levels regularly in
accordance with the manufacturer's service
schedule. Top them up if required, unless
otherwise indicated.
If a level drops significantly, have the
corresponding system checked by a CITROËN
dealer or a qualified workshop.
The fluids must comply with the manufacturer's requirements and with
the vehicle's engine.
Take care when working under the bonnet, as certain areas of the engine
may be extremely hot (risk of burns) and the
cooling fan could start at any time (even with
the ignition off).

134
Practical information
For more information on the precautions
to take before any work on the 12 V battery, refer to the corresponding section.
Versions equipped with Stop & Start are fitted with a 12 V lead-acid battery of specific technology and specification.
Its replacement should be carried out only by
a CITROËN dealer or a qualified workshop.
Passenger compartment
filter
Depending on the environment and the use of the vehicle (e.g. dusty atmosphere,
city driving), change it twice as often, if
necessary .
A clogged passenger compartment filter
can adversely affect air conditioning
system performance and generate
undesirable odours.
Air filter
Depending on the environment and the use of the vehicle (e.g. dusty atmosphere,
city driving), change it twice as often, if
necessary .
Oil filter
Change the oil filter each time the engine oil is changed.
Particle filter (Diesel)
When the particle filter is approaching saturation, this warning lamp comes on
temporarily, accompanied by a message warning
of the risk of filter clogging.
As soon as the traffic conditions permit,
regenerate the filter by driving at a speed of at
least 37 mph (60 km/h) until the warning lamp goes off.
If the warning lamp stays on, this
indicates a low Diesel additive level.
For more information on Checking levels,
refer to the corresponding section.
Following prolonged operation of the
vehicle at very low speed or at idle, you
may, in exceptional circumstances, notice the
emission of water vapour at the exhaust while
accelerating. This has no impact on the
vehicle’s behaviour or the environment.
New vehicle
During the first few particle filter
regeneration operations, you may notice a
"burning" smell. This is perfectly normal.
Manual gearbox
The gearbox does not require any maintenance (no oil change).
Automatic gearbox
The gearbox does not require any maintenance (no oil change).
Brake pads
Brake wear depends on the style of driving, particularly in the case of vehicles
used in town, over short distances. It may be
necessary to have the condition of the brakes
checked, even between vehicle services.
Unless there is a leak in the circuit, a drop in the
brake fluid level indicates that the brake pads
are worn.
After washing the vehicle, moisture, or in wintry conditions, ice can form on the
brake discs and pads: braking efficiency may
be reduced. Gently dab the brakes to dry and
defrost them.
Brake disc wear
For information on checking brake disc
wear, contact a CITROËN dealer or a
qualified workshop.
Manual parking brake
If you notice excessive brake lever travel or decreased effectiveness, the parking
brake must be adjusted, even between two
services.
This system must be checked by a CITROËN
dealer or a qualified workshop.
Wheels and tyres
The inflation pressure of all tyres, including the spare wheel, must be
checked on "cold” tyres.
The pressures indicated on the tyre pressure
label are valid for "cold" tyres. If you have driven
for more than 10 minutes or more than 6 miles
(10 kilometres) at over 31 mph (50 km/h), add 0.3 bar (30 kPa) to the values indicated on the
label.
Under-inflation increases fuel
consumption. Non-compliant tyre
pressure causes premature wear on tyres and
has an adverse effect on the vehicle's road
holding - risk of an accident!
Driving with worn or damaged tyres reduces the
braking and road holding performance of the
vehicle. It is recommended to regularly check the
condition of the tyres (tread and sidewalls) and
wheel rims as well as the presence of the valves.
When the wear indicators no longer appear set
back from the tread, the depth of the grooves is
less than 1.6 mm; it is imperative to replace the
tyres.
Using different size wheels and tyres from those
specified can affect the lifetime of tyres, wheel
rotation, ground clearance, the speedometer
reading and have an adverse effect on road
holding.
Fitting different tyres on the front and rear axles
can cause the ESC to mistime.

215
Alphabetical index
Children 72, 79–81, 83Children (safety) 84Child seats 72, 75–79Child seats, conventional 78–79Child seats, i-Size 83Child seats, ISOFIX 80–81, 83Cleaning (advice) 137–138Closing the boot 24, 26, 29Closing the doors 24–26, 29
Coat hanger 50Coat hook 50Collision risk alert 109–110Collision Risk Alert 108–110Configuration, vehicle 17–19Connection, Bluetooth 171, 184–185, 201–202, 205–207Connection, MirrorLink 183–184, 200Connection, Wi-Fi network 202Container, AdBlue® 136Control, electric windows 34Control, emergency boot release 29Control, emergency door 26–27Control, heated seats 38Control stalk, lighting 55–56Control stalk, wipers 60–63Courtesy lamp 149Courtesy lamps 53Cruise control 101, 103–104, 106–108Cruise control by speed limit recognition 103–104Cruise control, dynamic with Stop function 103–104
Cup holder 50
D
DAB (Digital Audio Broadcasting) - Digital radio 167–168, 181, 203–204Date (setting) 17, 22, 187, 210Daytime running lamps 57, 147
Deactivating the passenger airbag 74, 77–78Deadlocking 24, 26Defrosting 46–47Defrosting, front 46Demisting, front 46Demisting, rear 41Demisting, rear screen 41Dials and gauges 7Dimensions 162Dipstick 14, 132Direction indicators 56, 147–148Display, head-up 99–100Doors 29Driver’s attention warning 111 – 11 2Driving 86Driving aids camera (warnings) 99Driving aids (recommendations) 98Driving economically 6Dynamic stability control (DSC) 67–68
E
EBFD 67Eco-driving (advice) 6Economy mode 128Electric windows 34Electronic brake force distribution (EBFD) 67Emergency braking assistance (EBA) 67Emergency call 65
Emergency switching off 90Emergency warning lamps 64Emissions control system, SCR 15, 135Energy economy mode 128Engine compartment 131Engine, Diesel 123, 131, 139, 161Engine, petrol 131, 159Engines 158–159, 161Environment 6, 26ESC (electronic stability control) 67
F
Fatigue detection 111 – 11 2Filling the AdBlue® tank 133, 136Filling the fuel tank 123–124Filter, air 134Filter, oil 134Filter, particle 133–134Filter, passenger compartment 43, 134Fitting a wheel 143, 145Fitting roof bars 129

218
Alphabetical index
R
Radio 166–167, 179–180, 182, 202–204Radio, digital (Digital Audio Broadcasting - DAB) 167, 181, 203–204Range, AdBlue 14, 133RDS 180, 203Rear screen, demisting 46–47Recharging the battery 154
Recirculation, air 44Recovery 156Reduction of electrical load 128Regeneration of the particle filter 134Reinitialisation of the under-inflation detection system 98Reinitialising the remote control 28Reminder, key in ignition 88Reminder, lighting on 56Remote control 23–26Removing a wheel 143–145Removing the mat 50Replacing bulbs 146–148Replacing fuses 150–152Replacing the air filter 134Replacing the oil filter 134Replacing the passenger compartment filter 134Reservoir, screenwash 133Resetting the trip recorder 16Reversing camera 99, 116–118Roof bars 129Running out of fuel (Diesel) 139
S
Safety, children 74–81, 83Saturation of the particle filter (Diesel) 134Screen, instrument panel 20Screen menu map 183Screen, monochrome 17Screen, multifunction (with audio system) 165Screenwash 61
Screenwash, front 61Screenwash, rear 61SCR (Selective Catalytic Reduction) 15, 135Seat angle 37Seat belts 70–72, 78Seat belts, rear 71Seats, front 36–37Seats, heated 38Seats, rear 38–40, 76Sensors (warnings) 99Serial number, vehicle 162Service indicator 13Servicing 13, 133Settings, equipment 16–19Settings, system 186, 209Sidelamps 55–57, 147–148Snow chains 97, 124–125Socket, 12 V accessory 48Socket, auxiliary 169, 182, 204Socket, Jack 169, 204Sockets, audio 49Speed limiter 101, 103–106Speed limit recognition 101–103
Speedometer 99Stability control (ESC) 67–68Starting a Diesel engine 123Starting the engine 87Starting the vehicle 87–89Starting using another battery 90, 153Station, radio 166, 179–180, 202–203Stay, bonnet 130Steering mounted controls,
audio 165, 177, 191Steering wheel, adjustment 41Stickers, customising ~ Stickers, expressive 138Stopping the vehicle 87–89Stop & Start 21, 43, 46, 95–97,
123, 130, 134, 155
Storage 48, 50Storage box 53Storage wells 53Stowing rings 50Sunroof, panoramic 32–33Sunshine sensor 43Sun visor 47Switching off the engine 87Synchronising the remote control 28
T
Tables of fuses 150–152Tank, fuel 123–124Technical data 159, 161