2021 CITROEN C4 AIRCROSS Handbook (in English)

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Driving
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Going into engine START mode
The "AS &G" warning lamp goes off and the engine starts automatically:
- with a manual gearbox , when you fullydepress the clutch pedal.
For safety reasons or to ensure smooth operation, START mode is invoked automatically when:
Special cases: START invoked automatically
- the speed of the vehicle exceeds 2 mph (3 km/h) , - you open the driver's door, - you unfasten the driver's seatbelt, - some special conditions (battery charge, engine temperature, braking assistance, ambient temperature...) where the engine is needed to assure control of a system.
If the system has been deactivated in STOP mode, the engine will not start.
At any time, press the "AS &G O FF " switch to deactivate the system.
Deactivation
In this case the "AS &G" warning lamp flashes for few seconds, then goes off.
This operation is perfectly normal.
This is confirmed by the "AS &G O FF " warning lamp coming on in the instrument panel or instrument panel screen.
If the bonnet is opened while the engine is in standby, the "AS &G" warning lamp flashes, accompanied by an audible signal. The engine will not restart automatically. To restart the engine with the bonnet
open, use the ignition key or press the START/STOP button, while pressing fully on the brake and clutch pedals.

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Driving
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The system is reactivated automatically at every new start using the key or the START/STOP button.
Reactivation
Press the "AS &G O FF " switch again. The system is active again; this is confirmed by the "AS &G O FF " warning lamp going off in the instrument panel or instrument panel screen.
Operating fault
In the event of a malfunction with the system, the "AS &G O FF " warning lamp flashes in the instrument panel or instrument panel screen, and the system no longer operates. Have it checked by a CITROËN dealer or a qualified workshop.
This system requires a specific battery with a special specification and technology (reference numbers available from a CITROËN dealer or a qualified workshop).
Fitting a battery not listed by CITROËN introduces the risk of malfunction of the system.
Maintenance
The "Auto Stop & Go" system makes use of advanced technology. All work on this type of battery must be done only by a CITROËN dealer or a qualified workshop.
In the event of a fault in STOP mode, the vehicle may stall. The following warning lamps come on in the instrument panel or instrument panel screen:
It is then necessary to switch off the ignition, then restart the engine using the key or the
START/STOP button.

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Practical information
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Changing a wheel
The tools are stowed in the boot under the floor. To gain access to them:  Open the boot.  Lift and remove the boot floor.
Access to the vehicle's tools
List of tools
These tools are specific to your vehicle. Do not use them for anything else. 1. Wheelbrace. Used to remove the wheel trim and the wheel fixing bolts. 2. Jack. Used to raise the vehicle. 3. Handle. Used to operate the jack. 4. Removable towing eye. See "Recovering the vehicle".
5. Socket for security wheel bolts (available as an accessory). Used to adapt the wheelbrace to the special "security" wheel bolts.
Procedure for replacing a faulty wheel with the spare wheel using the tools supplied with the vehicle.
The jack must only be used to change a wheel with a damaged tyre. The jack does not require any maintenance.
The jack meets the European standard as defined in Directive 2006/42/CE on machinery. The declaration of conformity can be found at the end of this document. The name and complete address of the manufacturer or, as appropriate, their representative, together with the designation of the jack are given in this certificate of conformity.

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Practical information
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Removing a wheel
Parking the vehicle
Immobilise the vehicle where it does not block traffic; the ground must be level, stable and not slippery. Apply the parking brake, switch off the ignition and engage first gear to block the wheels. Never go underneath a vehicle raised using a jack; use an axle stand.
List of operations
 If your vehicle has security bolts (available as an accessory), fit the security bolt socket 5 to the wheelbrace 1 to slacken the security bolt.  Slacken the other bolts using the wheelbrace 1 o n l y.
Never use a jack other than the one provided by the manufacturer.
 Place the foot of the jack 2 on the ground and ensue that it is directly below the front A or rear B jacking point provided on the underbody, whichever is closest to the wheel to be changed.
Wheel with trim
When removing the wheel , remove the trim first using the handle 3 , pulling at the cutout. When refitting the wheel , refit the trim starting by placing its cutout opposite the valve and press on its outer edge with the palm of your hand.

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 Extend the jack 2 until it comes into contact with the jacking point A or B used; the contact area A or B on the vehicle must be correctly inserted into the central part of the head of the jack.
 Raise the vehicle until there is sufficient space between the wheel and the ground to admit the spare (not punctured) wheel easily.
 Remove the bolts and store them in a clean place.  Remove the wheel.
Ensure that the jack is stable.
If the ground is slippery or loose, the jack may slip or drop - Risk of injury! Ensure that the jack is positioned only at the jacking point A or B under the vehicle, ensuring that the contact area on the vehicle is well centred on the head of the jack. Otherwise there is a risk of damage to the vehicle and/or of the jack dropping or slipping - Risk of injury!

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Checks
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Avoid prolonged contact of used oil or
fluids with the skin. Most of these fluids are harmful to health or indeed very corrosive.
Do not discard used oil or fluids into sewers or onto the ground. Take used oil to a CITROËN dealer or a qualified workshop (France) or to an authorised waste disposal site.
Used products
Topping up
The reservoir must be topped up without delay by a CITROËN dealer or a qualified workshop.
Additive level
(1.6 HDi 110 Diesel versions
with particle filter)
The additive reservoir low level is indicated by the display of this message.
Fluid specifi cation
For optimum cleaning, this fluid must not be topped up with or replaced with plain water.
Screenwash and headlamp
wash fluid
To check or top up the fluid, stop the vehicle, apply the parking brake and switch off the engine.
 Open the bonnet and secure it with the stay.  Open the filler cap for the screenwash reservoir.  Check the level using the gauge, then top-up if necessary.  Refit the cap on the reservoir and close the bonnet.
In wintry conditions, the use of fluid with an ethyl alcohol or methanol base is recommended.

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Technical data
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* The maximum power corresponds to the value type-approved on a test bed, under conditions defined in European legislation (Directive 1999/99/EC).
Engines and gearboxes
.../S : model fitted with the Stop & Start (AS&G) function.
PETROL ENGINES1.6 litre 1152.0 litre 150
Model codes: BU...NKZ0 NKZ0/SNK Z9 NKZ9/SAFYR AFZ7AFY V AFZM
AFYT AFZH AFZ9
AFYW AFZP AFZC
Transmission mode2WD2WD2WD4WD2WD4WD
Cubic capacity (cc) 1 590 1 998
Bore x stroke (mm) 75 x 90 86 x 86
Max power * : EU standard (kW) 86 113
Max power engine speed (rpm) 6 000 6 000
Max torque: EU standard (Nm) 15 4 19 9
Max torque engine speed (rpm) 4 000 4 200
Fuel Unleaded Unleaded
Catalytic converter Ye s Ye s
GEARBOXES Manual (5-speed) CVT (6-speed) Manual (5-speed) CVT (6-speed)
OIL CAPACITY (in litres)
Engine (with filter replacement) 4.2 4.3

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Petrol weights and towed loads (kg)
The values for maximum towed weights type approved according to the sales zone (see the tables on the following pages). The exact values are given in your vehicle's registration document as well as on the manufacturer's plate. They are also mentioned in sales brochures. For more details, contact a CITROËN dealer or
a qualified workshop.
The kerb weight is equal to the unladen weight + driver (75 kg). The GTW and towed load values indicated are valid up to a maximum altitude of 1 000 metres; the towed load mentioned must be reduced by 10 % for each additional 1 000 metres of altitude. The speed of a towing vehicle must not exceed 60 mph (100 km/h) (comply with the legislation in force in your country).
High ambient temperatures may result in a reduction in the per formance of the vehicle to protect the engine; if the ambient temperature is above 37 °C, limit the towed load.
The weight of the braked trailer can be increased, within the GTW limit, if the GV W of the towing vehicle is reduced by an equal amount. Please note that towing using a lightly loaded towing vehicle may have an adverse effect on its road holding.