2011.5 Citroen C4 Owner's Manual

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Stop & Start (Auto Stop & Go) function


Operation


Going into engine STOP mode
The "AS&G"warning lamp comes on in
the instrument panel or the instrument panel screen and the engine goes intostandby after a few seconds:


- with a manual
gearbox
, with the vehicle stationary and your foot on the brake, whenyou put the gear lever into neutral andrelease the clutch pedal.

Never refuel with the engine in STOPmode; you must switch off the ignition with the key or the START/STOP button.
When the engine is stopped automatically, the operation of certainvehicle systems, such as for example,braking, power steering... are modified. Take care.


Special cases: STOP mode notavailable
STOP mode is not invoked when:


- the driver's seat belt is not fastened,

- the bonnet is open,

- the vehicle has not exceeded 3 mph (5 km/h) since the last engine start,

- the vehicle has restarted less than10 seconds ago,

- the engine is needed to maintain acomfor table temperature in the passenger compartment,

- demisting is active,

- some special conditions (battery charge, engine temperature, braking assistance,
ambient temperature...) where the engine isneeded to assure control of a system.

- th
e "AS&G"warning lamp is
flashing in the instrument panel.
This operation is perfectl
y normal.

The Stop & Star t (Auto Stop & Go) function puts the engine temporarily into standby during stops in the traffic (red lights, traffic jams, or other...). Theengine restarts automatically as soon as you want to move off. The restart takes place instantly, quickly and silently.
Per fect for urban use, the Stop & Star t (Auto Stop & Go) function reduces fuel consumption and exhaust emissions as well as the noise level whenstationary.

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Driving
The "AS&G"
warning lamp goes off
and the engine starts automatically:
- with a manual gearbox
, when you fullydepress the clutch pedal.
For safet
y reasons or to ensure smooth
operation, STA R T m o d e i s i n v o ke d
automatically when:

Special cases: START invoked
automaticall
y


- the speed of the vehicle exceeds 2 mph(3 km/h),

- 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 inSTOP mode, the engine will not star t.
At any time, press the "AS &G O FF "
switch todeactivate the system.


Deactivation
In this case the "AS&G"
warning lampflashes for few seconds, then goes off.
This operation is per fectly normal.
This is confirmed by the "AS&G OFF"warning lamp coming on in the instrument panel or instrument panel screen.

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The system is reactivated automatically at every new star t using the key or the STA R T/STOP button.

Reactivation

Press the "AS&G OFF"switch again.
The s
ystem 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 OFF"warning lamp flashes in theinstrument 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 numbersavailable from a CITROËN dealer or a qualified workshop).
Fitting a battery not listed by CITROËN
introduces the risk o
f malfunction of the system.

Maintenance

The "Auto Stop & Go" system makes use of advanced technology. All work on this type of battery must be doneonly by a CITROËN dealer or a qualified workshop.
In the event o
f a fault in STOP mode, the
vehicle may stall. The following warning lampscome on in the instrument panel or instrumentpanel screen:
It is then necessar
y to switch off the ignition,
then restart the engine using the key or theSTA R T/STOP button.

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Four wheel drive system
System which permits the selection of a transmission mode in relation to the driving conditions.
Three transmission modes are available and can be selected manually by the driver in accordance with his requirements.
You can chan
ge transmission mode when stationary or while driving.
The transmission mode can be selected byturning the control A .

Selecting the transmission
mode


4WD AUTO (position 1)

The vehicle operates with four wheel drive and
provides optimum traction for all levels of grip.
This is the vehicle's normal and regular
operating mode, the distribution of the torque between the front and rear axles is controlled
automatically.
The distribution favours the front wheels,
the transfer of torque to the rear wheels is
mana
ged electronically by the control unit
in relation to the level of grip, so providing
optimum road holding.


4WD LOCK (position 2)

The vehicle operates with four wheel drive in
this mode also.
It is recommended when grip is par ticularly
poor or di
fficult (sand, mud, slopes, ...).


2WD (position 3)

The vehicle operates with front two wheel drive.
This is suitable for use on a tarmac roads or
where the driver considers that there is no riskof loss of grip (dry road).
Display in the instrument panel
The transmission mode is displayed in the
form of an intermittent display in the instrumentpanel screen when the transmission mode is
selected.
The selection of this mode isrecommended when the level of grippermits.

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As the engine torque is applied to all four wheels, the condition of the tyres
has a considerable impact on theperformance of the vehicle. Ensure that all four tyres are in good condition. Avoid driving the vehicle in sandy or muddy areas or in other areas in whichthe wheels could spin. Spinning the wheels places thetransmission components under pressure and could cause a seriousmalfunction. Do not drive the vehicle through deep water. Avoid driving over excessively uneventerrain (risk of scraping under the body or of grounding on crossing a bridge).


Operating faults

If the selected transmission mode display flashes, the vehicle switches automatically to front "2WD"
transmission mode.
It is then no longer possible to select the
transmission mode using the control A
.
If the message "SLOW DOWN" is displayed on
the instrument panel, let the transmission cool
down then wait for the displa
y to clear beforesetting off again.
If "4WD" and "LOCK" are displayed alternatelyand if "SERVICE REQUIRED" is displayed in
the instrument panel, the system has failed and
the safety system has been activated.
Contact a CITROËN dealer or a qualified
workshop without dela
y.
Have your vehicle towed on a flatbed. The vehicle must not be towed with the front or rear wheels on the ground evenif it is in front "2WD" (2 wheel drive)mode.

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Cruise control
System which automatically maintains the vehicle speed at the value programmed by the driver, without any action on the accelerator pedal.
The cruise control is switched on
manually:
the vehicle speed must be at least 25 mph(40 km/h) and second gear or higher must be engaged in the case of a manual gearbox.
Th
e cruise control is switched offmanually, byfan action on the brake or clutch pedal or if theASC system is triggered.
The pro
grammed speed can be exceeded
temporarily by pressing the accelerator pedal.
The cruise control cannot, in any circumstances, take the place of the need to comply with speed limits or of the vigilance and responsibility of the driver. The controls o
f this system are grouped
together on the steering wheel.1."ON/OFF"
button: activation / deactivation of the cruise control mode.
2
."COAST SET"button: store a drivingspeed and decrease the cruising speed. 3."ACC RES"
button: increase the cruising speed and recall the stored speed.4."CANCEL"button: stop control of the
vehicle's speed.

Steering mounted controls
When you press button 1, the "CRUISE"indicator comes on in the instrument panel.

Display in the instrument panel


Programming
)Press button 1.)Set the programmed speed by accelerating to
the required speed, then press button 2 "COAST SET".
To return to the programmed speed, simply release the accelerator pedal.
Switching off the ignition cancels any programmed speed value.

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Increasing the programmed
speed
Decreasing the
pro
grammed speed
Te m p o r a r
y acceleration/
deceleration


Te m p o r a ry acceleration

Press the accelerator pedal as normal. When
the pedal is released, you return to the stored speed.
) Using button 2 "COAST SET":- successive presses decrease the speed in steps of approximately 1 mph (1.6 km/h).
- a maintained press of this button
decreases the speed pro
gressively. Once the speed required has been reached,release the button, the new speed is stored.)
Using the brake pedal:
- brake to deactivate the cruise control, then press button 2 "COAST SET"
. Release to store the new speed.

)Using button 3 "ACC R ES":


- successive presses increase the speed insteps of approximately 1 mph (1.6 km/h).

- a maintained press of this button increases
the pro
grammed speed progressively.
Once the speed required has been reached,
release the button, the new speed is stored.
)Using the accelerator pedal:


- accelerate to reach the speed required,
then press button 2 "COAST SET".Release the button to store the new speed.


Temporary deceleration
Press the brake pedal to reduce the speed. To
return to the stored speed, press button 3 "ACC
RES".

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When the cruise control is in operation,pay attention if you press and hold oneof the programmed speed adjustment buttons: this can result in a very rapidchange in the speed of your vehicle.
Do not use the cruise control on slippery roads or in heavy traffic. On a steep descent, the cruise control will not be able to prevent the vehiclefrom exceeding the programmed speed.
To prevent the mat from becomingcaught under the pedals:


- ensure that the mat is positioned correctly,


- never fit one mat on top of another.
T
o deactivate the cruise control:
)press the brakeor clutchpedal, or )press button 1 "ON OFF", or )press button 4 "CANCEL".
Deactivating the function
Reactivating the function

When the cruise control has been deactivatedusing the button 4 "CANCEL"
, you can return
to the stored speed by pressing button 3 "ACC
RES"
when you reach a minimum speed of 25 mph (40 km/h).

The cruise control may be deactivatedautomatically:
)when the vehicle reaches a speed below
20 mph (35 km/h),)when the active stability control system (ASC) comes into operation.