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Under-inflation alert
The loss of pressure detected does
not always lead to visible deformation
of the tyre. Do not rely on just a visual
check.This alert is also displayed when one or
more wheels is not fitted with a sensor
(for example, a space-saver or steel
spare wheel).
The alert is maintained until the tyre or
tyres concerned is reinflated, repaired
or replaced.
The spare wheel (space-saver type or
a steel rim) does not have a sensor.
The alert is given by the fixed illumination
of this warning lamp, accompanied by
an audible signal, and depending on
equipment, the display of a message.
In the event of a problem on one of the tyres,
the symbol or the message appears, according
to equipment, to identify it.
F
R
educe speed, avoid sudden steering
movements or harsh brake applications.
F
S
top as soon as it is safe to do so.
Operating fault
The flashing and then fixed
illumination of the under-inflation
warning lamp accompanied by the
illumination of the service warning
lamp indicates a fault with the system.
Go to a CITROËN dealer or a qualified
workshop
to have the system checked or,
following the repair of a puncture, to have the
original wheel, equipped with a sensor, refitted.
F
I
f you have a compressor (the one in the
temporary puncture repair kit for example),
check the four tyre pressures when cold.
I
f it is not possible to check the tyre
pressures at the time, drive carefully at
reduced speed.
or
F
I
n the event of a puncture, use the
temporary puncture repair kit or the spare
wheel (according to equipment).
Any tyre repair or replacement on a wheel
fitted with this system must be carried out by a
CITROËN dealer or a qualified workshop.
If after changing a tyre, a wheel is not detected
by your vehicle (fitting snow tyres for example),
you must have the system reinitialised by a
CITROËN dealer or a qualified workshop. In this case, monitoring of the tyre pressures is
not assured.
driving
Page 210 of 436

DS4_en_Chap08_conduite_ed03-2015
Stop & StartThe Stop & Start system puts the engine temporarily into standby - STOP mode - during stops in the traffic (red lights, traffic jams, or other...).
T he engine restarts automatically - START mode - as soon as you want to move off. The restart takes place instantly, quickly and silently.
Per fect for urban use, the Stop & Start system reduces fuel consumption and exhaust emissions as well as the noise level when stationary.
Operation
Going into engine STOP mode
STOP mode does not affect the
functionality of the vehicle, such as
braking, power steering, for example.
Never refuel with the engine in STOP
mode; you must switch off the ignition
with the key or the "START/STOP"
button.
The "ECO" warning lamp comes on in
the instrument panel and the engine
goes into standby automatically:
- with a manual gearbox, at speeds below 12 mph (20 km/h), or vehicle stationary with
PureTech 130 petrol and BlueHDi 115 and
120 Diesel versions, when you put the gear
lever into neutral and release the clutch
pedal,
-
w
ith an automatic gearbox, vehicle
stationary, when you press the brake pedal
or place the gear selector in position N .
If your vehicle is fitted with the
system, a time counter calculates
the sum of the periods in STOP
mode during a journey. It resets
itself to zero every time the
ignition is switched on with the key
or the "START/STOP" button.
STOP mode is not invoked when:
-
t he vehicle is on a steep slope (up or down),
-
t
he driver's door is open,
-
t
he driver's seat belt is not fastened,
-
t
he vehicle has not exceeded 6 mph (10 km/h)
since the last engine start (using the key or the
"START/STOP" button),
-
t
he electric parking brake is applied or being
applied,
-
t
he engine is needed to maintain a comfortable
temperature in the passenger compartment,
-
d
emisting is active,
-
s
ome special conditions (battery charge,
engine temperature, braking assistance,
ambient temperature...) where the engine is
needed to assure control of a system.
Special cases: STOP mode
unavailable
In this case, the "ECO" warning lamp
flashes for a few seconds, then goes
of f.
This operation is perfectly normal.
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Going into engine START mode
The "ECO" warning lamp goes off
and the engine starts automatically:
-
w
ith a manual gearbox , when you fully
depress the clutch pedal,
-
w
ith an automatic gearbox:
●
g
ear selector in position d or M, when
you release the brake pedal,
●
o
r gear selector in position N and brake
pedal released, when you place the gear
selector in position
d or M,
●
o
r when you engage reverse gear.
Special cases: START invoked
automatically
With a manual gearbox in STOP mode,
if a gear is engaged without fully
depressing the clutch pedal, a warning
lamp comes on or an alert message
is displayed asking you to depress the
clutch pedal to restart the engine.
In this case the "ECO" warning lamp
flashes for few seconds, then goes
of f.
This operation is perfectly normal. For safety reasons or to ensure smooth
operation, START mode is invoked
automatically when:
-
y
ou open the driver's door,
-
y
ou unfasten the driver's seat belt,
-
t
he speed of the vehicle exceeds 15 mph
(25 km/h) with a manual gearbox (3 km/h
(2 mph) with PureTech 130 petrol and
BlueHDi Diesel 115 and 120 versions) or
2
mph (3 km/h) with an automatic gearbox,
-
t
he electric parking brake is being applied,
-
s
ome special conditions (battery charge,
engine temperature, braking assistance,
ambient temperature...) where the engine is
needed to assure control of a system.
driving
Page 212 of 436
DS4_en_Chap08_conduite_ed03-2015
The system is reactivated automatically
at every new start using the key or the
"START/STOP" button.
Reactivation
Press the "ECO OFF" switch again.
The system is active again; this is confirmed
by the switch warning lamp going off and the
display of a message.
If the system has been deactivated
in STOP mode, the engine restarts
immediately.
At any time, press the "ECO OFF"
switch to
deactivate the system.
This is confirmed by the switch warning lamp
coming on accompanied by the display of a
message.
deactivation
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In the event of a malfunction with the system,
the "ECO OFF" switch warning lamp flashes,
then comes on continuously.
have it checked by a CITROËN dealer or a
qualified workshop.
Operating fault
In the event of a fault in STOP mode,
the vehicle may stall. All of the
instrument panel warning lamps come
on.
Depending on version, an alert
message may also be displayed asking
you to put the gear lever into position N
and put your foot on the brake pedal.
It is then necessary to switch off the
ignition, then restart the engine using
the key or the "START/STOP" button.Before doing any work under the
bonnet, deactivate the Stop & Start
system to avoid the risk of injury
related to an automatic change to
START
mode.
The Stop & Start system makes use of
an advanced technology. All work on
this type of battery must only be carried
out by a CITROËN dealer or a qualified
workshop.
Maintenance
This system requires the use of a 12 V battery
of specific technology and characteristics
(reference numbers available from a CITROËN
dealer or a qualified workshop).
Fitting a battery not listed by CITROËN would
introduces the risk of faults with the system.
driving
Page 214 of 436

DS4_en_Chap08_conduite_ed03-2015
Lane departure warning system
System which detects the involuntary crossing
of longitudinal traffic lane markings on the
ground (solid or broken line).
Sensors, fitted below the front bumper, trigger
a warning if the vehicle drifts over a lane
marking (speed higher than 50 mph (80 km/h)).
This system is particularly useful on motor ways
and main roads.
Activation
F When switching the ignition on or with the engine running, press this button; the
indicator lamp comes on.
The lane departure warning system
cannot in any circumstances replace
the need for vigilance on the part of the
driver.
It is necessary to observe driving
regulations and take a break every
two
hours.
deactivation
You are warned by the vibration of the driver's
seat cushion:
-
o
n the right-hand side, if the marking on
the ground has been crossed on the right,
-
o
n the left-hand side, if the marking on the
ground has been crossed on the left.
No warning is transmitted while the direction
indicator is active and for approximately
20
seconds after the direction indicator is
switched off.
A warning may be transmitted if a direction
marking (e.g. arrow) or non-standard marking
(e.g. graffiti) is crossed.
detection Operating fault
The detection may be impeded:
- i
f the sensors are dirty (mud, snow...),
-
i
f the markings on the ground are
worn,
-
i
f there is little contrast between
the markings on the ground and
the road sur face.
F
P
ress this button again, the indicator lamp
goes off.
The status of the system remains in the
memory when the ignition is switched off. In the event of a malfunction, the
service warning lamp comes on,
accompanied by an audible signal
and a message in the screen.
Contact a CITROËN dealer or a qualified
workshop.
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Blind spot sensors
This driving assistance system warns the driver
of the presence of another vehicle in the blind
spot angle of their vehicle (areas masked from
the driver's field of vision), as soon as this
presents a potential danger.
Operation
This system is designed to improve safety when driving and is in no circumstances a
substitute for the use of the interior rear view mirror and door mirrors. It is the driver's
responsibility to constantly check the traffic, to assess the distances and relative speeds of
other vehicles and to predict their movements before deciding whether to change lane.
The blind spot sensor system can never replace the need for vigilance on the part of
the
d
river. F
O
n switching on the ignition, or engine
running, press this button to activate the
function; the warning lamp comes on.
Sensors fitted in the front and rear bumpers
monitor the blind spots.
A warning lamp appears in the door mirror on
the side in question:
-
i
mmediately, when being overtaken,
-
a
fter a delay of about one second, when
overtaking a vehicle slowly.
driving
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DS4_en_Chap08_conduite_ed03-2015
No alert will be given in the following situations:
- i n the presence of immobile objects
(parked vehicles, barriers, street lamps,
road signs...),
-
w
ith vehicles moving in the opposite
direction,
-
d
riving on a sinuous road or a sharp
c o r n e r,
The alert is given by a warning lamp which
comes on in the door mirror on the side in
question as soon as a vehicle - car, lorry,
cycle
- is detected.
For this, the following conditions must be met:
-
a
ll the vehicles must be moving in the
same direction,
-
t
he speed of your vehicle is between 7 and
75 mph (12 and 140 km/h),
-
w
hen you overtake a vehicle with a speed
difference of less than 6 mph (10 km/h),
-
w
hen a vehicle overtakes you with a speed
difference of less than 15 mph (25 km/h),
-
t
he traffic must be flowing normally,
-
i
n the case of an overtaking manoeuvre,
if this is prolonged and the vehicle being
overtaken remains in the blind spot,
-
y
ou are driving on a straight or slightly
curved road,
-
y
our vehicle is not pulling a trailer, a
caravan... -
w hen overtaking (or being overtaken by) a
very long vehicle (lorry, coach...) which is
at the same time detected at the rear in the
blind spot angle and present in the driver's
forward field of vision,
-
i
n very heavy traffic: vehicles detected in
front and behind are confused with a lorry
or a stationary object,
-
w
hen overtaking quickly.