display CITROEN C5 2021 Workshop Manual
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104
Driving
 
 
 
 
â–º Press this button; the content is identical to 
that of the  Shortcuts tab.
Road signs recognition
For more information, refer to the 
General recommendations on the use 
of driving and manoeuvring aids .
 
 
This system displays the maximum speed 
authorised locally on the instrument panel, using:
–
 
Speed limit signs detected by the camera.
–
 
Speed limit information from the navigation 
system’
s mapping. –
 
Signs indicating a shared traffic zone detected 
by the camera.
Sign detected Suggested speed  (calculated)
Entry into a shared  traffic zoneExample:
 
 
Without MyCitroën 
Drive Plus
10 mph or 20
  km/h 
(depending on 
the units on the 
instrument panel) With MyCitroën  Drive Plus
Display of the speed 
in force in the country  you are driving in.
–
 
Some supplementary traffic signs detected by 
the camera.
Supplementary 
traffic sign detected Display of 
the   speed 
associated with 
the supplementary  traffic sign
Speed limit when  raining
Examples:
 
 
If the wiper control  stalk is in the 
"intermittent wipe" 
or "automatic wipe"  position (in order 
to activate the rain  sensor):
68 mph (110
  km/h) 
(for example)
Speed limit when  towing
 
 
If an approved towing device is fixed to the  vehicle:
56 mph (90
  km/h) 
(for example)
Speed limit 
applicable over a  certain distance Example:
 
 
43 mph (70 km/h) 
(for example)   
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Driving
6Supplementary 
traffic sign detected Display of 
the   speed 
associated with 
the supplementary  traffic sign
Speed limit for 
vehicles with a  gross vehicle 
weight or gross 
train weight less  than 3.5 tonnes
 
 
56 mph (90 km/h) 
(for example)
Speed limit in case  of snow
Example:
 
 
If the outside 
temperature is below  3°C:
19 mph (30
  km/h) 
(for example)
with a "snowflake"  symbol
Speed limit at 
certain times of the  day
Example:
 
 
19 mph (30 km/h) 
(for example)
with a "clock" symbol
Navigation mapping should be regularly 
updated in order to receive accurate 
speed limit information from the system.
The units for the speed limit (mph or  km/h) depend on the country you are 
driving in.
This should be taken into account to ensure 
you observe the speed limit.
For the system to work properly when 
changing countries, the speed unit of the 
instrument panel must match that of the 
country you are driving in.
Automatic sign reading is a driving aid  system and does not always display the 
correct speed limits.
The speed limit signs present on the road 
always take priority over those displayed by 
the system. 
The system is designed to detect signs that 
conform to the Vienna Convention on road 
signs.
Specific speed limits, such as those for 
heavy goods vehicles, are not displayed.
The display of the speed limit on the 
instrument panel is updated when passing 
a speed limit sign intended for cars (light 
vehicles).
Activation/Deactivation
By default, the system is automatically activated 
at every engine start.
It is configured in the ADAS touch screen 
application.
Information displayed on 
the instrument panel
 
 
1. Detected speed limit indication
or
2. End of speed limit indication
 
 
The system is active but is not detecting speed 
limit information.
 
 
On detecting speed limit information, the system 
displays the value.
 
 
For a suggested maximum speed, the first time 
that the vehicle exceeds it
 by more than 3 mph 
(5
  km/h) (e.g. 59 mph (95   km/h)), the speed is 
displayed and flashes for 10 seconds (depending 
on version).   
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Driving
Operating limits
The system does not take account of reduced 
speed limits, especially those imposed in the 
following cases:
– 
Atmospheric pollution.
–
  Towing.
–
 
Driving with a space-saver type spare wheel 
or snow chains fitted.
–
 
T
 yre repaired using the temporary puncture 
repair kit.
–
 
Y
 oung drivers.
The system may not display the speed limit if it 
does not detect a speed limit sign within a preset 
period and in the following situations:
–
 
Road signs that are obstructed, non-standard, 
damaged or bent.
–
 
Obsolete or incorrect maps.
Speed setting 
recommendations
The driver can select the speed displayed by the 
Road signs recognition  function as the speed 
setting for the speed limiter, cruise control or 
adaptive cruise control using the
 
OK
   button.
In the event of rain detection, the system offers 
the driver a speed setting lower than the speed 
read/from the map in order to adapt to weather 
conditions (e.g.
  on motorways, the proposed 
speed is 68 mph (110 km/h) instead of 81 mph 
(130 km/h).
Speed setting advance recommendations
With Highway Driver Assist 2.0 activated, 
the system detects the next speed limit sign, 
displays it in the background and proposes this 
new speed as the speed setting.
Once memorised:
–
 
If the speed setting is lower than the previous 
one, the vehicle slows down to reach this new 
speed when it gets to the sign.
–
 
If the speed setting is higher than the previous 
one, the vehicle speeds up to reach this new 
speed when it passes the sign.
For more information on the  Speed 
limiter, Cruise control or Adaptive 
cruise control, refer to the corresponding 
sections.
Steering-mounted controls 
 
 
 
1. Select speed limiter mode
2. Select cruise control mode
3. Memorise the speed setting
Information displayed on the 
instrument panel
 
 
 
 
Without speed setting advance 
recommendations
 
 
With speed setting advance 
recommendations
4. Current speed setting   
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Driving
65.Speed memorisation prompt
6. Current speed limit indication
7. Next speed limit indication
Operating conditions
– Eligible roads: roads with separate 
carriageways with prohibited access for 
pedestrians and cyclists.
–
 
Highway Driver 
 Assist 2.0 activated.
–
 
V
 ehicle speed between 0 and 112 mph (0 and 
180 km/h).
–
 
Steering wheel properly held by the driver
 .
Memorising the speed setting
â–º Switch on the speed limiter 1-LIMIT  or cruise 
control 2.
Information related to the speed limiter or cruise 
control is displayed.
When a new speed setting is detected, the 
system displays the value and “ OK?“ to suggest 
saving it as a new speed setting.
If there is a difference of less than 3 mph 
(5   km/h) between the speed setting and 
the speed displayed by the Road signs 
recognition, the " OK?“ symbol is not 
displayed.
Depending on the road conditions, several 
speeds may be displayed.
â–º
 
Press 
 3-OK to confirm the new speed setting.
The display then reverts to its previous state.
Extended Traffic Sign 
Recognition
For more information, refer to the 
General recommendations on the use 
of driving and manoeuvring aids .
 
 
This additional system recognises these road 
signs and displays them on the instrument panel 
if the appropriate display mode is selected:
–
 
No entry:
  when entering a lane in the wrong 
direction, an alert message, including the symbol 
of this sign, is displayed on the instrument panel 
(request to check the direction of traffic).
–
 
Other signs:
  as you approach it, the symbol 
of the corresponding sign is displayed on the 
instrument panel.
The actual road signs always take priority  over the display from the system.
The signs must comply with the Vienna 
Convention on road signs.
Activation/Deactivation
It is configured in the ADAS touch screen 
application.
Speed limiter
For more information, refer to the 
General recommendations on the use 
of driving and manoeuvring aids .
This system prevents the vehicle from 
exceeding the speed programmed by the 
driver (speed setting).
The speed limiter is switched on manually.
The minimum speed setting is 19 mph (30
  km/h).
The speed setting remains in the system 
memory when the ignition is switched off.
Steering-mounted controls 
 
 
 
1. Speed limiter ON/OFF
2. Switch on/pause the speed limiter at the 
previously saved speed setting
3. Increase/Decrease the speed setting   
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Driving
4.Activate the speed limiter at the previously 
saved speed setting
Use the speed suggested by the Road signs 
recognition
For more information on the  Road signs 
recognition , refer to the corresponding section.
Information displayed on 
the instrument panel
 
 
5.Speed limiter mode selection indication
6. Speed limiter on (green)/pause (grey) 
indication
7. Speed setting value
8. Speed suggested by the Road signs 
recognition function (depending on version)
Switching on/Pausing
â–º Press  1-LIMIT to select the speed limiter 
mode; the function is paused (grey).
â–º
 
If the limit speed setting is suitable (most 
recent speed setting programmed in the system), 
press
  2-I I> or 4-OK to switch the speed limiter 
on (green).
â–º
 
Pressing 
 2-I I>   again temporarily pauses the 
function.
When the speed setting remains below 
the vehicle's speed for a prolonged 
period of time, an audible warning is emitted.
Adjusting the speed setting
You do not have to switch the speed limiter on in 
order to set the speed.
To change the speed setting using the vehicle’s 
current speed:
â–º
 
For steps of +/- 1 mph (1 km/h), make 
successive short presses upwards/downwards 
on 
3 to increase/decrease.
â–º
 
For steps of +/- 5 mph (5
   km/h), press and 
hold upwards/downwards on  3 to increase/
decrease.
When the function is activated, it is possible to 
modify the cruise speed setting based on the 
speed suggested by the Road signs recognition 
function, as shown on the instrument panel:
–
 
When passing the sign:
â–º Press  4-OK to save the suggested speed. 
This value is then immediately shown as the new 
speed setting on the instrument panel.
–
 
After passing the sign:
â–º
 
Press 
 4-OK. The message "OK?" is 
displayed to confirm the request to save.
â–º
 
Press 
 4-OK again to save the suggested 
speed. The new speed setting value is displayed 
on the instrument panel.
Temporarily exceeding the 
speed setting
â–º Fully depress the accelerator pedal.
The speed limiter is temporarily deactivated and 
the displayed speed setting flashes.
â–º
 
Release the accelerator pedal to return to 
below the speed setting.
When exceeding the speed is not due to the 
driver's action (e.g.
  in case of a steep slope), an 
audible signal is triggered immediately.
On a steep descent or in the event of 
sharp acceleration, the speed limiter will 
not be able to prevent the vehicle from 
exceeding the speed setting.
If necessary, apply the brakes to control your 
vehicle’s speed.
When the vehicle speed returns to the speed 
setting level, the speed limiter operates again: 
the speed setting display becomes fixed again.   
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Driving
6Off
â–º Press 1-LIMIT: the speed limiter information 
display disappears.
Malfunction
In the event of a malfunction, dashes are 
displayed flashing and then fixed (orange) 
instead of the speed setting.
Have it checked by a CITROËN dealer or a 
qualified workshop.
Cruise control - Specific 
recommendations
The cruise control function does not  guarantee compliance with the maximum 
authorised speed and the safety distance 
between vehicles, the driver remains 
responsible for their driving.
In the interest of public safety, only use cruise 
control if the traffic conditions enable vehicles 
to drive at a steady speed and maintain an 
adequate safety distance.
Remain vigilant while cruise control is 
activated. If you press and hold one of the 
speed setting modification buttons, your 
vehicle may change speed very abruptly.
When descending a steep hill , the cruise 
control system cannot prevent the vehicle 
from exceeding the set speed. Brake if 
necessary to control the vehicle speed.
On steep climbs or when towing, the set 
speed may not be reached or maintained.
Exceeding the programmed speed 
setting
You can temporarily exceed the speed 
setting by pressing the accelerator pedal (the 
programmed speed flashes).
To return to the speed setting, release the 
accelerator pedal (when the set speed is 
reached again, the displayed speed stops 
flashing).
Operating limits
Never use the system in the following 
situations:
–
 
In an urban area with the risk of 
pedestrians crossing the road.
–
 
In heavy traffic (except versions with the 
Stop & Go function).
–
 
On winding or steep roads.
–
 
On slippery or flooded roads.
–
 
In poor weather conditions.
–
 
In the event of restricted visibility for the 
driver
.
–
 
Driving on a speed circuit.
–
 
Driving on a rolling road.
–
 
When using a ‘space-saver
 ’ type spare 
wheel.
–
 
When using snow chains, non-slip covers 
or studded tyres.
Cruise control
For more information, refer to the 
General recommendations on the use 
of driving and manoeuvring aids  and 
to
 
Cruise control - particular 
recommendations.
This system automatically maintains the  vehicle’s speed at the value programmed 
by the driver (speed setting), without the use of 
the accelerator pedal.
Cruise control is switched on manually.
It requires a minimum vehicle speed of 25 mph 
(40
 
km/h).
With an automatic gearbox, mode
 
D
  or second 
gear or higher in mode
 
M
  must be engaged.
Cruise control remains active after 
changing gear on engines fitted with Stop 
& Start.
Switching off the ignition cancels any 
speed setting.   
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Driving
Steering-mounted controls 
 
 
 
1. Cruise control ON/OFF
2. Switch on/pause cruise control at the 
previously saved speed setting
3. Increase/Decrease the speed setting (if 
cruise control activated)
Activation of cruise control in progress (if 
cruise control deactivated)
4. Activation of cruise control in progress
Use the speed suggested by the Road signs 
recognition
For more information on the  Road signs 
recognition , refer to the corresponding section.
Information displayed on 
the instrument panel
 
 
5.Cruise control mode selection indication
6. Cruise control on (green)/pause (grey) 
indication
7. Speed setting value
8. Speed suggested by the Road signs 
recognition function (depending on version)
Switching on/pausing
â–º Press button  1 to select the cruise control 
mode; the function is paused (grey).
â–º
 
Press 
 3 upwards/downwards, or press  4-OK 
to activate the cruise control and save a speed 
setting as soon as the vehicle speed reaches the 
desired level (green).
â–º
 
Pressing button  2-I I>
  temporarily pauses the 
function.
â–º Pressing  2-I I> or 4-OK again will reactivate 
cruise control (green).
Cruise control operation is also 
temporarily interrupted (pause):
–
 
by pressing the brake pedal.
–
 
automatically
 , if the electronic stability 
control (ESC) system is triggered.
–
 
by shifting to neutral or engaging reverse 
gear
.
–
 
by using the electric parking brake.
Modifying the speed setting
The cruise control must be active.
To change the speed setting using the vehicle’s 
current speed:
â–º  
For steps of +/- 1 mph (1 km/h), 
make successive short presses upwards/
downwards
  on 3 to increase/decrease.
â–º
 
For steps of +/- 5 mph (5
   km/h), press and 
hold upwards/downwards on  3 to increase/
decrease.
Prolonged pressing and holding 
upwards/downwards on  3 causes a very 
rapid change in vehicle speed.
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.   
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Driving
6When the function is activated, it is possible 
to change the speed setting using the speed 
suggested by the Road signs recognition 
function displayed on the instrument panel:
– 
When passing the sign:
â–º
 
Press 
 4-OK to save the suggested speed. 
This value is then immediately shown as the new 
speed setting on the instrument panel.
–
 
After passing the sign:
â–º
 
Press 
 4-OK. The message "OK?" is 
displayed to confirm the request to save.
â–º
 
Press 
 4-OK again to save the suggested 
speed. The new speed setting value is displayed 
on the instrument panel.
Off
â–º Press  1: the cruise control information display 
disappears.
Malfunction
In the event of a malfunction, dashes are 
displayed flashing and then fixed (orange) 
instead of the speed setting.
Have it checked by a CITROËN dealer or a 
qualified workshop.
Highway  Driver Assist
Only available on versions with automatic 
gearbox.
This system automatically adjusts the speed 
and corrects the trajectory of the vehicle, using 
the Adaptive Cruise Control with Stop&Go in 
conjunction with the Lane Positioning Assist.
These two functions must be activated and in 
operation.
This system is especially suitable for driving on 
motorways and main roads.
For more information on  Adaptive cruise 
control and Lane Positioning Assist, refer to 
the corresponding sections.
The system assists the driver by acting  on the steering, acceleration and braking 
within the physical limits
  and capacities of the 
vehicle. Certain road infrastructure elements 
or vehicles in the surroundings may not be 
properly seen or may be poorly interpreted by 
the camera and radar, resulting in an 
unexpected change in direction, a lack of 
steering correction and/or inappropriate 
management of acceleration or braking.
Selecting/Deselecting the 
system
 
 
 
ASSIST
 
â–º Press this button successively until the 
Highway Driver  Assist mode is displayed on the 
instrument panel.
â–º
 
After a few seconds, the Highway Driver 
Assist mode is selected. 
The Driving aids mini-
view is displayed on the instrument panel.
 
 
The colour of the symbols, representing the 
steering wheel and the side lines, depends on 
the operating state of the system:
(grey)
One or more operating conditions is not 
met; the system is paused.
(green)
All operating conditions are met; the 
system is active.
(orange)
System malfunction.
â–º
 
Press this button successively again until the 
OFF mode is displayed on the instrument panel. 
â–º
 
After a few seconds, the Highway Driver 
Assist mode is deselected. 
The Driving aids 
mini-view disappears.
Highway Driver Assist 2.0
This system automatically regulates the speed  and corrects the trajectory of the vehicle by 
combining the following functions:   
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Driving
– Highway Driver Assist with Adaptive Cruise 
Control with Stop&Go and Lane positioning 
assist.
–
 
Speed setting advance recommendations.
–
 
Speed adjustment during cornering.
–
 
Semi-automatic lane changing.
By default, these functions are activated; but 
they can be deactivated.
For more information on these functions, refer to 
the corresponding sections.
The availability of the system depends on the 
country you are driving in.
This system is only to be used on eligible 
motorways and main roads.
Selecting/Deselecting the 
system
It is configured in the ADAS touch screen 
application.
The system's status is saved when the ignition is 
switched off.
Adaptive cruise control
For more information, refer to the 
General recommendations on the use 
of driving and manoeuvring aids  and 
to
 
Cruise control - particular 
recommendations.
This system automatically maintains the vehicle 
speed at a value set by the driver (speed 
setting), while respecting a safety distance from 
the vehicle in front (target vehicle) previously set 
by the driver. The system automatically manages 
the acceleration and deceleration of the vehicle.
With the Stop
  &   Go function, the system 
manages braking until the vehicle comes to a 
complete stop and the restarting of the vehicle.
The brake lamps come on if the vehicle  is slowed down by the system.
The system is not operational in the event of 
a brake lamp failure.
 
 
To do this, the system uses a camera fitted at the 
top of the windscreen and a radar fitted in the 
front bumper.
Primarily designed for driving on main 
roads and motorways, this system only 
works with moving vehicles driving in the 
same direction as your vehicle.
If the driver activates the direction 
indicator to overtake a slower vehicle, 
cruise control may temporarily reduce the 
distance to the target vehicle to facilitate 
overtaking, without exceeding the speed 
setting.
Steering-mounted controls 
 
 
 
1. Selection of cruise control alone or Highway 
Driver Assist (depending on version)/
Deselection
2. Switch on/pause cruise control at the 
previously saved speed setting
Confirmation of vehicle restart after automatic 
stop
3. Increase/Decrease the speed setting (if 
cruise control activated)
Activation of cruise control in progress (if 
cruise control deactivated)
Display and configuration of the inter-vehicle 
distance setting
4. Activation of cruise control in progress
Use the speed suggested by the Road signs 
recognition
For more information on the  Road signs 
recognition , refer to the corresponding section.   
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11 3
Driving
6Information displayed on 
the instrument panel
 
 
5.Cruise control activated (green)/paused 
(grey)
6. Speed setting value
7. Speed suggested by the Road signs 
recognition
8. Vehicle held
  stationary
9. Inter-vehicle distance setting
10. Position of the vehicle detected by the 
system
Use
Selecting the system
â–º With the engine running, press successively 
on   1-ASSIST until cruise control mode is 
displayed on the instrument panel.  â–º
 
After a few seconds, cruise control mode is 
selected. 
 The Driving aids mini-view is displayed 
(grey) and cruise control is ready to be activated.
Switching on cruise control
The vehicle speed must be between 0 and 
112   mph (0 and 180   km/h).
System activation is also subject to the following 
conditions:
–
 
driver's door closed.
–
 
driver's seat belt fastened.
–
  mode  D selected on the automatic gearbox.
–
 
parking brake released.
–
 
if the vehicle is stationary
 , brake pedal 
depressed.
The message “OK?" is displayed if all the 
activation conditions are met.
â–º
 
Press 
 on 4-OK: the current speed becomes 
the speed setting (minimum 19 mph (30
  km/h)) 
and cruise control is immediately activated 
(green display).
Modifying the speed setting
To change the speed setting using the vehicle’s 
current speed:
â–º
 
For steps of +/- 1 mph (1 km/h), make 
successive short presses upwards/downwards 
on 
3 to increase/decrease.
â–º
 
For steps of +/- 5 mph (5
   km/h), press and 
hold upwards/downwards on  3 to increase/
decrease.
Prolonged pressing and holding 
upwards/downwards on  3 causes a rapid 
change in vehicle speed.
When the function is activated, it is possible 
to change the speed setting using the speed 
suggested by the Road signs recognition 
function displayed on the instrument panel:
–
 
When passing the sign:
â–º
 
Press 
 4-OK to save the suggested speed. 
This value is then immediately shown as the new 
speed setting on the instrument panel.
–
 
After passing the sign:
â–º
 
Press 
 4-OK. The message “OK?" is 
displayed to confirm the request to save.
â–º
 
Press 
 4-OK again to save the suggested 
speed. The new speed setting value is displayed 
on the instrument panel.
Pausing/resumption of cruise control
â–º Press  2-I I> or depress the brake pedal. 
The symbol "I I>” is displayed if all the activation 
conditions are met. 
Cruise control may also have been paused:
–
 
automatically
 , if the electronic stability control 
(ESC) system is triggered.
–
 
by shifting to neutral or engaging reverse gear
 .
–
 
by using the electric parking brake.
–
 
by unfastening the seat belt.
–
 
by opening the driver's door
 .
â–º
 
Press 
 2-I I> or 4-OK to reactivate cruise 
control.
Following braking that has brought the vehicle 
to a complete stop, if the traffic conditions do