instrument panel CITROEN C5 AIRCROSS DAG 2022 Handbook (in English)

124
Driving
Cruise control can also be paused
temporarily:
– by pressing the brake pedal.
– automatically, if the electronic stability
control (ESC) system is triggered.
Modifying the cruise speed
setting
Cruise control must be active.
To modify the cruise speed setting, based on the
current speed of the vehicle:
► Briefly press button 2 or 3 to change the
value in steps of + or - 1 mph (km/h).
► Press and hold button 2 or 3 to change the
value in steps of + or - 5 mph (km/h).
Pressing and holding button 2 or
3 results in a rapid change in the speed
of the vehicle.
As a precaution, we recommend setting a cruise speed fairly close to the current
speed of your vehicle, to avoid any sudden
acceleration or deceleration of the vehicle.
To change the cruise speed setting using memorised speed settings and from the touch
screen:
► Press button 5 to display the memorised
speed settings.
► Press the touch screen button for the desired
speed setting.
Programmable cruise
control
Refer to the General recommendations on the
use of driving and manoeuvring aids and to
Cruise control - particular recommendations.
This system automatically keeps the vehicle’s speed at the cruise value
programmed by the driver (speed setting),
without using the accelerator pedal.
Cruise control is switched on manually.
It requires a minimum vehicle speed of 25 mph
(40

km/h).
With a manual gearbox, third gear or higher must
be engaged.
With an automatic gearbox, mode

D
or second
gear or higher in mode

M
must be engaged.
Cruise control remains active after
changing gear, regardless of the gearbox
type, on engines fitted with Stop & Start.
Switching off the ignition cancels any
speed setting.
Steering-mounted control

1. ON (CRUISE position)/OFF (position 0)
2. Activate cruise control at the current speed/
decrease speed setting
3. Activate cruise control at the current speed/
increase speed setting
4. Pause/resume cruise control with the speed
setting previously saved
5. Depending on version:
Display the speed thresholds saved using the
Memorising speeds function
or
Use the speed suggested by the Speed Limit
Recognition and Recommendation ( MEM
display)
For more information on Memorising speeds
or the Speed Limit Recognition and
Recommendation, refer to the corresponding
sections.
Information displayed on
the instrument panel




6. Speed limiter status: on (amber)/pause
(grey).
7. Cruise control mode selection
8. Speed setting value
9. Speed suggested by the Speed Limit
recognition and recommendation system
(depending on version)
Switching on/pausing
► Turn thumbwheel 1 to the "CRUISE" position
to select cruise control mode; the function is
paused.
►

Press button
2 or 3 to activate cruise control
and save a speed setting when the vehicle has
reached the desired speed; the vehicle’s current
speed is saved as the speed setting.
►

Release the accelerator pedal.
►


Pressing button 4

temporarily pauses the
function.
►

Pressing button 4

again restores operation of
the cruise control (ON).

125
Driving
6Cruise control can also be paused
temporarily:
–

by pressing the brake pedal.
–


automatically
, if the electronic stability
control (ESC) system is triggered.
Modifying the cruise speed
setting
Cruise control must be active.
To modify the cruise speed setting, based on the
current speed of the vehicle:
►

Briefly press button
2 or 3 to change the
value in steps of +
or - 1 mph (km/h).
►

Press and hold button

2
or 3 to change the
value in steps of +
or - 5 mph (km/h).
Pressing and holding button 2 or
3 results in a rapid change in the speed
of the vehicle.
As a precaution, we recommend setting a cruise speed fairly close to the current
speed of your vehicle, to avoid any sudden
acceleration or deceleration of the vehicle.
To change the cruise speed setting using memorised speed settings and from the touch
screen:
►

Press button
5 to display the memorised
speed settings.
►

Press the touch screen button for the desired
speed setting. The selection screen closes after a few
moments.
This setting becomes the new cruise speed.
T
o modify the cruise speed setting using the
speed suggested by the Speed Limit Recognition
and Recommendation shown on the instrument
panel:
►
Press button
5 once; a message is displayed
to confirm the memorisation request.
►
Press button
5 again to save the suggested
speed.
The speed is immediately shown on the
instrument panel as the new speed setting.
Switching off
► Turn the thumbwheel 1 to the "0” position: the
cruise control information disappears from the
screen.
Malfunction

Dashes are displayed (flashing, initially, then
fixed) in the event of a cruise control system
malfunction.
Have the system checked by a CITROËN dealer
or a qualified workshop.
Memorising speeds
This function, used only for the speed limiter
and programmable cruise control, lets you
save speed settings that will subsequently be
proposed for the purpose of configuring these
two systems.
You can memorise multiple speed settings for
each of the two systems.
By default, some speed settings are already
memorised.
As a safety measure, the driver must only change speed settings when stationary.
Changing a speed setting
Speed settings can be activated,
deactivated, selected and changed in the
Driving
/ Vehicle touch screen menu.
"MEM" button



With this button, you can select a memorised
speed setting to use with the speed limiter or the
programmable cruise control.
For more information on the Speed limiter
or Cruise control, refer to the corresponding
section.

127
Driving
64.Pause/resume cruise control with the speed
setting previously saved
Confirmation of vehicle restart after automatic
stop (versions with Stop & Go function)
5. Use the speed suggested by the Speed Limit
Recognition and Recommendation ( MEM
display)
6. Display and adjustment of the distance
setting to the vehicle in front
Use
Activating the system (pause)
► With the engine running, turn the thumbwheel
1 downwards to the CRUISE position. Cruise
control is ready to operate (grey display).
Switching on cruise control and setting
the speed
With a manual gearbox, your speed must be
between 19 and 112 mph (30 and 180 km/h).
With an automatic EAT6 gearbox, your speed
must be between 1 and 112
mph (2 and
180
km/h).
With an automatic EAT8 gearbox, your speed
must be between 0 and 112
mph (0 and
180
km/h).
►

Press button
2 or 3: the current speed
becomes the speed setting (minimum 19 mph
(30
km/h)) and cruise control is immediately
activated (green display).
► Press 3 to increase or 2 to decrease the
speed setting (steps of 5 mph (km/h) if held
pressed).
Pressing and holding button 2 or
3 results in a rapid change in the speed
of the vehicle.
Pausing / resumption of cruise control
► Press 4 or depress the brake pedal. To
pause cruise control, it is also possible to: •

shift from mode
D to N;
•

depress the clutch pedal for more than 10
seconds;
•


press the electric parking brake control.
►


Press
4 to restart cruise control. Cruise
control may have been paused automatically: •

when
the speed of the vehicle goes below 19
mph (30
km/h) with a manual gearbox.
•

when the speed of the engine goes below
1

100 rpm with a manual gearbox.
•

by triggering of the ESC system.
With an EA

T6 gearbox, following braking that
has brought the vehicle to a complete stop,
the system holds the vehicle stationary; cruise
control is paused. The driver should depress
the accelerator pedal to move off, then, when
above 1 mph (2
km/h), reactivate the system by
pressing one of the buttons 2, 3 or 4.
With an EAT8 gearbox, following braking that
has brought the vehicle to a complete stop, if the
traffic conditions do not allow the vehicle to begin
moving again within 3
seconds of stopping,
press button 4 or the accelerator pedal to move
off.
If the driver takes no action after the vehicle
has been stopped, the electric parking brake is
applied automatically after about 5 minutes.
Cruise control remains active after
changing gear, regardless of the gearbox
type.
When the driver attempts to reactivate
cruise control, after the function has been
paused, the message "Activation not possible,
unsuitable conditions" is briefly displayed if
reactivation is not possible (safety conditions
not met).
Modifying the programmed speed setting
with the Speed Limit Recognition and
Recommendation function
► Press 5 to accept the speed suggested by
the function on the instrument panel, then press
again to confirm.
To prevent sudden acceleration or deceleration of the vehicle, select a
speed setting relatively close to the vehicle's
current speed.
Changing the inter-vehicle distance
► Press 6 to display the distance setting
thresholds ("Distant", "Normal" or "Close"), then
press again to select a threshold.

128
Driving
When moving off again, watch out for
cyclists, pedestrians and animals, as
they may not be detected properly.
Operating limits
Cruise control operates by day and night, in fog
or moderate rainfall.
Certain situations cannot be managed by the
system and require driver intervention.
Cases of non-detection by the system:
– Pedestrians, some cyclists, animals.
– Stationary vehicles (traffic jam, breakdown,
etc.).


– Vehicles crossing your lane.
– Vehicles driving in the opposite direction.
Situations in which the driver must pause the
cruise control system:


– Vehicles in a tight bend.
After a few seconds, the option is accepted and
will be memorised when the ignition is switched
off.
Temporarily exceeding the speed setting
► Fully depress the accelerator pedal. Distance
monitoring and cruise control are deactivated
while acceleration is maintained. "Cruise control
suspended" is displayed.
Deactivating the system
► Turn the thumbwheel 1 upwards to the OFF
position.
Information displayed on
the instrument panel
The following information can be seen on the
instrument panel in "DRIVING" display mode.


7. Vehicle detected by the system (full symbol)
8. Cruise control active (colour not grey)
9. Speed setting value
10. Speed suggested by the Speed Limit
Recognition and Recommendation
11 .Vehicle held stationary (versions with
automatic gearbox)


12.Inter-vehicle distance setting
13. Position of the vehicle detected by the
system
Messages and alerts
The "Driving" display mode of the digital
instrument panel must have been selected first.
The display of these messages or alerts
is not sequential.
"Cruise control paused" or "Cruise control
suspended" following a brief acceleration
by the driver.
"Cruise control active", no vehicle
detected.
"Cruise control paused", vehicle detected.
"Cruise control active", vehicle detected.
"Take back control" (orange).
►

Brake or accelerate, depending on the
context.
"Take back control" (red).
► Take back control of the vehicle
immediately: the system cannot manage the
current driving situation.
"Activation not possible, conditions
unsuitable". The system refuses to
activate cruise control, as the necessary
conditions are not fulfilled.
Stop function
"Cruise control paused" (for a few
seconds).
The system has brought the vehicle to a
complete stop and is holding it immobilised:
cruise control is paused.
The driver must accelerate to move off again,
then reactivate cruise control.
Stop & Go function
"To move off again, press the
accelerator pedal or press
the

II

button” (button 4).
The system has brought the vehicle to a
complete stop.
Within 3 seconds, the vehicle gradually and
automatically begins moving again.
After 3 seconds, the driver must accelerate or
press button 4 to move off again.
While the vehicle is immobilised, the
following recommendations apply:
–

The driver should not leave the vehicle.
–


Do not open the boot.
–


Do not drop off or pick up passengers.
–


Do not engage reverse gear
.

130
Driving
Driving situations and related alerts
The tables below describe the displays associated with the main driving \
situations. The display of these alerts is not sequential.Button indicator lamp Cruise control thumbwheelSymbols
Display Comments
Off CRUISE


(grey)


(grey)Cruise control paused; lane positioning
assist not active.
Off CRUISE

(green)


(grey)Cruise control active; lane
positioning assist not active.
Green CRUISE

(green)


(green)Highway Driver Assist active, operates
normally (correction is made at the steering
wheel).
Active Lane Keeping
Assist
Refer to the General recommendations on the
use of driving and manoeuvring aids .


Using a camera located at the top of the
windscreen, the system identifies lane markings
and steers the vehicle inside this lane to keep it
in the lateral position chosen by the driver.
This function is primarily suitable for driving on
motorways and main roads.
Operating conditions
– Adaptive Cruise Control active.
– T raffic lane marked out by lines on both sides.
–

ESC system operational.
–


ASR/CDS systems activated.
–


No trailer detected.
–


No 'space-saver' spare wheel in use.
–


V
ehicle not subject to strong lateral g-forces.
–

Direction indicators not activated.
Activation/Deactivation



► With the Adaptive Cruise Control with Stop &
Go function activated, press this button.
The action is confirmed by:
–

The indicator lamp in the button lighting up
green.
–


The following symbol being displayed on the
instrument panel.
The colour of the symbol on the instrument panel
depends on the operating status of the system:
(grey colour)
One or more operating conditions is not
met; the system is paused.
(green colour)
All operating conditions are met; the
system is active.
(orange colour)
System malfunction.
If the driver no longer wishes to use the system
for a while, they can deactivate it by pressing the
button again.
The indicator lamp in the button goes off and the
symbol disappears from the instrument panel.
The system status is saved when the ignition is switched off.
Cruise control
The driver must hold the steering wheel properly.
When cruise control is activated, the symbol is
displayed in green: by small steering actions,
the system directs the vehicle and keeps it in the
position chosen by the driver, in the traffic lane.
This position is not necessarily the centre of the
lane.
The driver can feel movements in the steering
wheel.
The driver can change the position of the vehicle
at any time, by turning the steering wheel, which
suspends the function. The driver positions the
vehicle where they wish to in the lane. When
the driver feels that the vehicle’s position is
appropriate, they maintain it until the function
is reactivated. The system regains control by
regulating on the new defined position.
Pausing/Suspending the
system
The driver must act promptly if they believe that the traffic conditions or the
state of the road surface require their
intervention, by moving the steering wheel to
temporarily suspend system operation. Any
action on the brake pedal that results in cruise

133
Driving
6Operating limits
The Lane Keeping Assist system may issue an alert when the vehicle is
travelling in a long straight lane on a smooth
road surface even if the driver is holding the
steering wheel properly.
The system may fail to operate or may produce
unsuitable corrections to the steering in the
following situations:
–

Poor visibility (insufficient road lighting,
snowfall, rain, fog).
–


Dazzle (headlamps of an oncoming vehicle,
low sun, reflections on a wet road surface,
leaving a tunnel, alternating light and shade).
–


Windscreen area in front of the camera being
dirty

, misted up, frost-covered, snow-covered,
damaged or masked by a sticker.
–

Lane markings eroded, partially hidden (snow
,
mud) or multiple (roadworks, surface joints).
–

T

ravelling in a tight bend.
–

Winding roads.
–


Presence of a tarmac joint on the road.
The system must not be activated in the following situations:
–

Driving with a "space-saver" type spare
wheel.
–


When towing, especially with an
unconnected or unapproved trailer

.
–

Poor weather conditions.
–


Driving on slippery road surfaces (risk of
aquaplaning, snow

, ice).
– Driving on racing circuits.
– Driving on a rolling road.
Malfunction
In the event of a malfunction, the
Service warning lamp comes on
and this (orange) symbol appears on the
instrument panel, accompanied by the display of
a message and an audible signal.
Have it checked by a CITROËN dealer or a
qualified workshop.
Active Safety Brake with Collision Risk Alert and
Intelligent emergency
braking assistance
Refer to the General recommendations on the
use of driving and manoeuvring aids .


This system:
–
warns the driver that their vehicle is at risk of
collision with the vehicle in front, a pedestrian or
,
depending on version, a cyclist.
–

reduces the vehicle's speed to avoid a
collision or limit its severity

.
The system also takes motorcyclists and animals into account; however, animals
below 0.5
m tall and objects on the road are
not necessarily detected.
This system is comprised of three functions:
–

Collision
Risk Alert.
–

Intelligent emergency braking assistance.
–


Active Safety Brake (automatic emergency
braking).


The vehicle has a multifunction camera located
at the top of the windscreen and, depending on
version, a radar located in the front bumper.
This system does not replace the need for vigilance on the part of the driver.
This system is designed to assist the driver
and improve road safety.
It is the driver's responsibility to continuously
monitor traffic conditions in accordance with
applicable driving regulations.

134
Driving
first level of alert may not be displayed: the
level 2 alert may be displayed directly.
Important: the level 1 alert is not displayed
when there is a stationary obstacle or
when the "Near" trigger threshold has been
selected.
Intelligent emergency
braking assistance
If the driver brakes, but not sufficiently to avoid a
collision, this system will supplement the braking,
within the limits of the laws of physics.
This assistance will only be provided if the driver
presses the brake pedal.
As soon as the system detects a potential obstacle, it prepares the braking
circuit in case automatic braking is needed.
This may cause a slight noise and a slight
sensation of deceleration.
Deactivation / Activation
By default, the system is automatically activated
at every engine start.
It is set via the Driving / Vehicle touch
screen menu.
Deactivation of the system is signalled by
the illumination of this warning lamp,
accompanied by the display of a message.
Operating conditions and
limits
Vehicle moving forward.
ESC system in working order.
DSC/ASR systems activated.
Seat belts fastened for all passengers.
Stabilised speed on roads with few bends.
In the following cases, deactivating the system
via the vehicle's configuration menu is advised:
–

T
owing a trailer.
–

Carrying long objects on roof bars.
–


V
ehicle with snow chains fitted.
–

Before using an automatic car wash, with the
engine running.
–


Before placing the vehicle on a rolling road in
a workshop.
–


T
owed vehicle, engine running.
– Damaged front bumper (version with radar).
– Following an impact to the windscreen close to
the detection camera.
The system is automatically deactivated when the use of certain types of
"space-saver" spare wheel (smaller diameter)
is detected, or if a fault with the brake pedal
switch or at least two brake lamps is detected.
It can be dangerous to drive if the brake
lamps are not in perfect working order.
It is possible that warnings are not given,
are given too late or seem unjustified.
The driver must always stay in control of the
vehicle and be prepared to react at any time
to avoid an accident.
After an impact, the function automatically stops operating. Contact a
CITROËN dealer or a qualified workshop to
have the system checked.
Collision Risk Alert
This function warns the driver that their vehicle
is at risk of a collision with the vehicle in front, or
with a pedestrian or cyclist present in their traffic
lane.
Modifying the alert trigger threshold
This trigger threshold determines the sensitivity
with which the function warns of the risk of
collision.
The threshold is set via the Driving /
Vehicle touch screen menu.
►

Select one of the three pre-defined
thresholds: "Far", "Normal" or "Close".
The last threshold selected is memorised when
the ignition is switched off.
Operation
Depending on the degree of risk of collision
detected by the system and the alert trigger
threshold chosen by the driver, several different
levels of alert may be triggered and displayed in
the instrument panel.
The system takes account of the vehicle
dynamics, the speed of your vehicle and the one
in front, the environmental conditions and the
operation of the vehicle (actions on the pedals,
steering wheel, etc.) to trigger the alert at the
most relevant moment.
Level 1 (orange): visual alert only,
warning that the vehicle in front is very
close.
The message
"Vehicle close" is displayed.
Level 2 (red): visual and audible alert,
warning that a collision is imminent.
The message "Brake! " is displayed.
Where the speed of your vehicle is too
high approaching another vehicle, the

140
Driving
Operating limits



No alert is triggered in the following conditions:
Deactivation / Activation



► Press this button to deactivate/reactivate the
system at any time.
Deactivation is signalled by the lighting of
the indicator lamp in the button and this
warning lamp in the instrument panel.
The system is automatically reactivated every
time the ignition is switched on.
Malfunction
In the event of a malfunction, these
warning lamps light up on the
instrument panel, accompanied by the display of
a message and an audible signal.
Have it checked by a CITROËN dealer or a
qualified workshop.
Blind Spot Monitoring
Refer to the General recommendations on the
use of driving and manoeuvring aids .


This system includes sensors, placed on the
sides of the bumpers, and warns the driver of
the potentially dangerous presence of another
vehicle (car, truck, motorcycle) in the blind spot
areas of their vehicle (areas hidden
from the
driver's field of vision).


The warning is given by a fixed warning lamp
that appears in the door mirror on the side in
question:
–

immediately
, when being overtaken;
–

after a delay of about one second, when
overtaking a vehicle slowly

.
Activation/Deactivation
It is set via theDriving/Vehicle touch
screen menu.
When starting the vehicle, the warning lamp
comes on in each mirror to indicate that the
system is activated.
The status of the system is memorised when the
ignition is switched off.
The system is automatically deactivated when towing with a towing device
approved by CITROËN.
Operating conditions
– All vehicles are moving in the same direction
and in adjacent lanes.
–

The speed of your vehicle must be between 7
and 87 mph (12 and 140

km/h).
–

When overtaking a vehicle, the speed
difference is less than 6

mph (10 km/h).
–

When overtaken by a vehicle, the speed
difference is less than 16

mph (25 km/h).
–

T
raffic is flowing normally.
–

Overtaking a vehicle over a certain period of
time 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,
etc.

141
Driving
6Operating limits



No alert is triggered in the following conditions:
– In the presence of non-moving objects (parked
vehicles, barriers, street lamps, road signs, etc.).
–

Oncoming traffic.
–


Driving on a winding road or a sharp corner
.
–

When overtaking or being overtaken by a very
long vehicle (lorry

, bus, etc.) that is detected
in the rear blind spot but is also present in the
driver’s front field of vision.
–

When overtaking quickly
.
–

In very heavy traffic: vehicles detected in
front and behind are confused with a lorry or a
stationary object.
–


If the Park
Assist function is activated.
Malfunction
If the event of a malfunction, this warning
lamp comes on in the instrument panel,
accompanied by the display of a message.
Contact a CITROËN dealer or a qualified
workshop to have the system checked.
The system may suffer temporary interference in certain weather conditions
(rain, hail, etc.).
In particular, driving on a wet surface or
moving from a dry area to a wet area can
cause false alerts (for example, the presence
of a fog of water droplets in the blind spot can
be interpreted as a vehicle).
In bad or wintry weather, ensure that the
sensors are not covered by mud, ice or snow.
Take care not to cover the warning zone in
the door mirrors, or the detection zones on
the front and rear bumpers with adhesive
labels or other objects; they may hamper
correct operation of the system.
Active Blind Spot Monitoring System
In addition to the fixed warning lamp in the door
mirror on the side in question, a correction of
trajectory will be felt if you attempt to cross
a lane marking with the direction indicator
activated, to help you avoid a collision.
This system is the combination of the Active
Lane Departure Warning System and Blind Spot
Monitoring.
These two functions must be activated and in
operation.
The speed of the vehicle must be between 40
and 87
mph (65 and 140 km/h).
These functions are especially suitable for
driving on motorways and main roads.
For more information on the Active Lane
Departure Warning System and Blind Spot
Monitoring , refer to the corresponding sections.
Parking sensors
Refer to the General recommendations on the
use of driving and manoeuvring aids .

142
Driving
The rear parking sensors system will be deactivated automatically if a trailer or
bicycle carrier is connected to a towing device
installed in accordance with the
manufacturer's recommendations.
In this case, the outline of a trailer is displayed
at the rear of the image of the vehicle.
The parking sensors are deactivated while the
Park Assist function is measuring a space.
For more information on the Park Assist, refer
to the corresponding section.
When the vehicle is started, the visual
and audible aids will be available after
the touch screen has started up.
Operating limits
If the boot is heavily loaded, the vehicle may tilt,
affecting distance measurements.
Malfunction
In the event of a malfunction when
shifting to reverse, one of these
warning lamps comes on on the instrument
panel, accompanied by the display of a message
and an audible signal (short beep).
If the malfunction occurs while the parking
sensors are being used, it causes the function to
deactivate.
Contact a CITROËN dealer or a qualified
workshop to have the system checked.

Using sensors located in the bumper, this
system signals the proximity of obstacles
(e.g.
pedestrian, vehicle, tree, barrier) present in
their field of detection.
Rear parking sensors
The system is switched on by engaging reverse
gear, which is confirmed by an audible signal.
The system is switched off when disengaging
reverse gear.
Audible assistance

The system signals the presence of obstacles
within the sensors’ detection zone.
The proximity information is given by an
intermittent audible signal, the frequency of
which increases as the vehicle approaches the
obstacle.
When the distance between the vehicle and
the obstacle becomes less than about thirty
centimetres, the audible signal becomes
continuous.
The sound emitted by the speaker (right or
left) indicates the side on which the obstacle is
located.
Adjusting the audible signalDepending on version, with
CITROËN Connect Radio or
CITROËN Connect Nav, pressing this button
opens the window for adjusting the volume of
the audible signal.
Visual assistance

This supplements the audible signal, without
taking account of the vehicle's trajectory, by
displaying bars on the screen whose location
represents the distance between the obstacle
and the vehicle (white: more distant, orange:
close, red: very close).
This supplements the audible signal by
displaying bars on the screen whose location
represents the distance between the obstacle
and the vehicle (white: more distant, orange:
close, red: very close).
When the obstacle is very close, the "Danger"
symbol is displayed on the screen.
Front parking sensors
Supplementing the rear parking sensors, the
front parking sensors are triggered when an
obstacle is detected in front and the speed of the
vehicle is still below 6 mph (10
km/h).
Front parking sensor operation is suspended if
the vehicle stops for more than three seconds in
forward gear, if an obstacle is no longer detected
or the vehicle speed exceeds 6
mph (10 km/h).
The sound emitted by the speaker (front or rear) locates the obstacle relative to
the vehicle, in front or behind it.
Deactivation/Activation
It is set via the Driving/Vehicle touch
screen menu.
The system status is memorised when the
ignition is switched off.