Page 211 of 421

209
DS4_en_Chap06_conduite_ed01-2016
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.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
F Press this button again, the indicator lamp goes off.
The status of the system remains in the
memory when the ignition is switched off. 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.
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.
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.
Activation
F When switching the ignition on or with the engine running, press this button; the
indicator lamp comes on.
Detection
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.
06
Driving
Page 212 of 421

210
DS4_en_Chap06_conduite_ed01-2016
Blind spot monitoring system
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.
06
Driving
Page 228 of 421
226
A DYNAMIC PARTNERSHIP,
DIRECTED TOWARDS THE FUTURE.
For more than 45 years, TOTAL and DS have
shared common values: excellence, creativity and
technological innovation.
It is in this same spirit that TOTAL has developed a
range of TOTAL QUARTZ lubricants adapted to DS
engines,
making them even more fuel efficient and protective of
the environment.
Choose TOTAL QUARTZ lubricants
for servicing your vehicle,
this is your assurance of optimum
durability and per formance from your
engine.
07
Practical information
Page 229 of 421

227
DS4_en_Chap07_info-pratiques_ed01-2016
FuelCapacity of the tank: approximately 60 litres.
Low fuel level
When the low fuel level in the
tank is reached, this warning lamp
comes on in the instrument panel,
accompanied by an audible warning
and the display of an alert message.
When it first comes on, around
6
litres of fuel remain in the tank.
Refuelling
F Press this button until the automatic opening of the fuel flap is heard.
T
his button remains active for a few
minutes after switching off the ignition. If
necessary, switch the ignition on again to
reactivate it.
F
T
ake care to select the pump that delivers
the correct fuel for your vehicle.
If your vehicle is fitted with Stop &
Start, never refuel with the engine in
STOP mode; you must switch off the
ignition using the key, or the START/
STOP button if your vehicle has
Keyless Entry and Starting.
Additions of fuel must be of at least 5 litres to
be registered by the fuel gauge.
Opening the filler cap may result in an inrush of
air. This vacuum is entirely normal and results
from the sealing of the fuel system.
Until sufficient fuel has been added, every time
the ignition is switched on, this warning lamp
appears, accompanied by an audible signal
and an alert message. When driving, this
audible signal and alert message are repeated
with increasing frequency, as the level drops
towards 0.
You must refuel as soon as possible to avoid
running out.
For more information on Running out of fuel
(Diesel) , refer to the corresponding section.
07
Practical information
Page 230 of 421
228
If you have put in the wrong fuel for
your vehicle, you must have the tank
drained and refilled with the correct
fuel before you star t the engine.
Fuel supply cut-off
Your vehicle is equipped with a safety device
which cuts off the fuel supply in the event of a
collision.
F
I
ntroduce the nozzle so as to push in the
metal non-return flap .
F
M
ake sure that the nozzle is pushed in as
far as possible before starting to refuel (risk
of blowback).
F
M
aintain this position while refuelling.
F
P
ush the fuel flap to close it. If you are filling your tank to the top, do not
persist after the third cut- off; this could
cause your vehicle to malfunction.
The petrol or Diesel engine of your vehicle is
fitted with a catalytic converter, a device which
helps to reduce the level of harmful emissions
in the exhaust gases.
For petrol engines, the use of unleaded fuel
is compulsory.
The filler neck is narrower, admitting unleaded
petrol nozzles only.
07
Practical information
Page 231 of 421

229
DS4_en_Chap07_info-pratiques_ed01-2016
Travelling abroad
As Diesel fuel pump nozzles may
be different in other countries, the
presence of the misfuel prevention
device may make refuelling impossible.
Not all Diesel vehicles are fitted with
misfuel protection, so before travelling
abroad, we recommend that you check
with the CITROËN dealer network,
whether your vehicle is suitable for the
fuel pumps in the country in which you
intend to travel.
Misfuel prevention (Diesel)*Mechanical device which prevents filling the tank of a Diesel vehicle with petrol. It avoids the risk of
engine damage that can result from filling with the wrong fuel.
Located in the filler neck, the misfuel prevention device appears when the filler cap is removed.
When a petrol filler nozzle is introduced into the
fuel filler neck of your Diesel vehicle, it comes
into contact with the flap. The system remains
closed and prevents filling.
Do not persist but introduce a Diesel type
filler nozzle.
Operation
It remains possible to use a fuel can to
fill the tank.
In order to ensure a good flow of fuel,
do not place the nozzle of the fuel can
in direct contact with the flap of the
misfuel prevention device and pour
s l ow l y.
* Depending on the country of sale.
07
Practical information
Page 232 of 421

230
Fuel used for petrol engines
The petrol engines are compatible with
bio-fuels that conform to current and future
European standards and can be obtained from
filling stations:
Fuel used for Diesel engines
The Diesel engines are compatible with
biofuels that conform to current and future
European standards and can be obtained from
filling stations:The only Diesel additives authorised for
use are those that meet the B715000
standard. The use of any other type of (bio)
fuel (vegetable or animal oils, pure
or diluted, domestic fuel...) is strictly
prohibited (risk of damage to the engine
and fuel system).
The only petrol additives authorised for
use are those that meet the B715001
standard.
Travelling abroad
Cer tain fuels could damage the
engine of your vehicle. In cer tain
countries, the use of a par ticular
fuel may be required (specific
octane rating, specific sales
name…) to ensure correct operation
of the engine.
For any additional information, contact
your dealer. -
Pe
trol that meets the EN228
standard, mixed with a bio-
fuel meeting the EN15376
standard. -
D
iesel fuel that meets
standard EN590 mixed with
a biofuel that meets standard
EN14214 (possibly containing
up to 7 % Fatty Acid Methyl
Ester),
-
D
iesel fuel that meets
standard EN16734 mixed with
a biofuel that meets standard
EN14214 (possibly containing
up to 10 % Fatty Acid Methyl
Ester),
- P araffinic Diesel fuel that
meets standard EN15940
mixed with a biofuel that
meets standard EN14214
(possibly containing up to 7 %
Fatty Acid Methyl Ester). The use of B20 or B30 fuel
meeting standard EN16709
is possible in your Diesel
engine. However, this use,
even occasional, requires
strict application of the special
servicing conditions referred to as
"Arduous conditions".
For more information, contact a CITROËN
dealer or a qualified workshop.
07
Practical information
Page 241 of 421

239
DS4_en_Chap07_info-pratiques_ed01-2016
Energy economy modeSystem which manages the period of use of certain functions to conserve a sufficient level of
charge in the battery.
After the engine has stopped, you can still use functions such as the audio equipment, windscreen
wipers, dipped beam headlamps,
courtesy lamps, etc. for a maximum combined period of thirty
minutes.
This period may be greatly reduced if
the battery is not fully charged.
A flat battery prevents the engine from
starting.
For more information on the 12 V
battery, refer to the corresponding
section.
If the telephone is being used at the
same time with the touch screen tablet,
it will be interrupted after 10 minutes.
Switching to economy mode
Once this period has elapsed, a message
appears in the screen indicating that the
vehicle has switched to economy mode and the
active functions are put on standby.
Exiting economy mode
These functions are reactivated automatically
the next time the vehicle is driven.
F
I
n order to resume the use of these
functions immediately, start the engine and
let it run for a few minutes.
The time available to you will then be double
the period for which the engine is left running.
However, this period will always be between
five and thirty minutes.
Load reduction modeSystem which manages the use of certain
functions according to the level of charge
remaining in the battery.
When the vehicle is being driven, the load
reduction function temporarily deactivates
certain functions, such as the air conditioning,
the heated rear screen...
The deactivated functions are reactivated
automatically as soon as conditions permit.
07
Practical information