2021 CITROEN C4 AIRCROSS battery

195
Check the electrolyte level and top up if
necessary (see "Checking levels").
Starting using another
battery
F Connect the red cable to the positive terminal (+) of the flat battery A , then to the
positive terminal (+) of the slave battery B. F
C onnect one end of the green or black
cable to the negative terminal (-) of the
slave battery B .
F

C
onnect the other end of the green or black
cable to the earth point C on your vehicle
(engine mounting).
F

O
perate the starter, let the engine run.
F

W
ait until the engine returns to idle and
disconnect the cables.
F

R

aise the protective cover on the (+)
terminal.
7
Practical information

196
The batteries contain harmful substances
such as sulphuric acid and lead. They
must be disposed of in accordance
with regulations and must not, in any
circumstances, be discarded with
household
w
aste.
Take used remote control batteries and
vehicle batteries to a special collection point.
Do not reverse the polarity and use only a 12 V charger.
D o not disconnect the terminals while the engine is running.
Do not charge the batteries without disconnecting the terminals first.
Do not push the vehicle to start the engine if it is fitted with a CVT gearbox.
It is advisable to disconnect the battery
if the vehicle is to be left unused for
more than one month.
Before disconnecting
the battery
Wait 2 minutes after switching off the
ignition before disconnecting the battery.
Close the windows and the doors before
disconnecting the battery.
Following reconnection
of the battery
Following reconnection of the battery,
switch on the ignition and wait 1 minute
before starting to permit initialisation of the
electronic systems. However, if problems
remain following this operation, contact a
CITROËN dealer or a qualified workshop.
F

D

isconnect the battery from the vehicle,
if

necessary.
F

F

ollow the instructions for use provided by
the manufacturer of the charger.
F

R

econnect starting with the negative
terminal (-).
F

C

heck that the terminals and connectors
are clean. If they are covered with sulphate
(whitish or greenish deposit), remove them
and clean them.
Charging the battery using
a battery charger
Some functions are not available if the battery is not sufficiently charged.
Practical information

216
Checks
12 V battery
Electrolyte level
For access to the battery, refer to the
"12V battery" section.Refer to the maintenance and
warranty guide for details of the
replacement intervals for these
components.
Air filter and passenger compartment filter
Replace the oil filter each time the
engine oil is changed.
Refer to the maintenance and
warranty guide for details of the
replacement interval for this
component.
Oil filter
If necessary, top up using distilled water,
removing the battery cap from each cell.
Check the electrolyte level at least once
a
month.
When carrying out work on the battery, refer
to "12V battery" section for details of the
precautions to be taken before disconnecting
the battery and following its reconnection.
Unless other wise indicated, check these components in accordance with the maintenance and warranty guide and according to your engine.
Other wise, have them checked by a CITROËN dealer or a qualified workshop.
The electrolyte level must be between the
"LOWER LEVEL" and "UPPER LEVEL" marks.
Depending on the environment (e.g. dusty
atmosphere) and the use of the vehicle
(e.g. city driving), replace them twice as often
if necessary .
A clogged passenger compartment filter may
have an adverse effect on the per formance
of the air conditioning system and generate
undesirable odours.
Checks

249
TOUCH SCREEN AUDIO-TELEMATIC
system
The system is protected in such a way that it will only
operate in your vehicle.01 First steps - Control panel
For safety reasons, the driver must carry out operations
which require prolonged attention while the vehicle is
stationary.
When the engine is switched off and to prevent
discharging of the battery, the system switches off
following the activation of the energy economy mode.
CONTENTS
03

General
operation
04
Navigation
05
Media
06
Settings
07
Information p.
p.
p.
p.
p.
p.
p. 250
251
253
254
270
282
284
02

Steering mounted
controls p.
288
08
BLUETOOTH
® streaming - telephone

289
TOUCH SCREEN AUDIO-CD
system
The system is protected in such a way that it will only
operate in your vehicle.
01 First steps - Control panel
For safety reasons, the driver must carry out operations
which require prolonged attention while the vehicle is
stationary.
When the engine is switched off and to prevent
discharging of the battery, the system switches off
following the activation of the energy economy mode.
Contents
03

General
operation
02

Steering mounted
controls
04
Radio
05
Music
06
Bluetooth
® telephone p.
p. p.
p.
p.
p. 290
291
293
300
303
308

3 11
AUDIO-CD system
The system is protected in such a way that it will only
operate in your vehicle.01 First steps - Control panel
For safety reasons, the driver must carry out operations
which require prolonged attention while the vehicle is
stationary.
When the engine is switched off and to prevent
discharging of the battery, the system switches off
following the activation of the energy economy mode.
CONTENTS
02

Steering mounted
controls
03

General
operation
04
Radio
05

Music media players
06


USB player
07

BLUETOOTH
® streaming
Error messages p.
p.
p.
p.
p.
p.
p.
p. 312
314
315
317
323
328
330
332

04
318Press one of the six buttons "1" to "6" until an
audible signal is heard.
The sound cuts out then becomes audible again
when the station has been preset.
The number of the button and the associated radio
frequency appear in the screen. Manual station presetting
To recall the pre-set stored setting, press the button and release it
within two seconds.
RADIO
You can preset up to six stations on each waveband.
Presetting a new station replaces the previous station.
Automatic station presetting
Disconnecting the battery terminals clears the preset radio stations. Stations can only be preset automatically on wavebands FM1, FM2
and FM3.
Presetting new stations replaces the previous stations.
This presetting can be activated automatically irrespective of the
waveband selected.
Press the RADIO button for more
than two seconds.
The six stations offering the best
reception are preset and classified
from the weakest to the strongest on
the six corresponding buttons.
Recalling preset stations
Press one of the six buttons "1" to "6". The station
corresponding to the waveband selected appears on
the screen.

335
ABS and EBFD systems ...............................14 2ac
cessories .............................. ....................204
Accessory socket, 12V

...................... 9
0, 92, 93
a

ccess to bulbs
............................................. 18

3
ac

tive stability control (
aS
C)
........................14

4
Adjusting headlamps
.................................... 13

3
Adjusting head restraints

................................73
A

djusting seat belt height
.............................14

6
Adjusting the steering wheel

..........................79
A

irbag, knee
.......................................... 15

2, 15 4
Airbags
...............

........................................... 150
Airbags, curtain
..................................... 15

3, 15 4
Airbags, front......................................... 150, 15 4
Airbags, lateral
...................................... 15

2, 15 4
Air conditioning
...............................

.......... 10, 81
Air conditioning, automatic
................................................ 8

1, 84
Air conditioning, manual
...............

..................................... 81, 82
ai

r filter
...............
........................................... 216
ai

r flow
..............................
..............................80
Air intake

...............
....................................83, 86
ai

r vents
..............................
............................80
Alarm
............................................................... 65
A

nti-lock braking
system (ABS)

.............................................. 14

2
Anti-theft
..............................

................... 61, 102
apple® player ............... 278, 279, 280, 304, 306
Armrest, front ...................................... 7 4, 90, 93
Armrest, rear

................................................... 76aSC ........

....................................................... 14 4
ash

tray, portable
.......................................9
0, 92
Audible warning
............................................ 1

41
Audio-CD
..............................

....... 276, 303, 323
Audio file formats

.......................................... 2

76
Audio streaming (
b
lu

etooth)
..............................
............330, 331
Audio systems

............................... 2
49, 289, 311Audio-telematics
...............................

............
249
Automatic illumination of headlamps
...................................... 1
28, 130
Automatic operation
of hazard warning lamps
............................
1
41
Automatic rain sensitive windscreen wipers
...................................... 13
6
Automatic switching off of lighting
................
13
0
Auxiliary
sockets
...........9
4, 278 -281, 304-308, 328 -329
AC
Capacity, fuel tank ..............................
..........210
CD changer ............................... ....................325
CD MP3

................
........................ 276, 303, 325
Central locking

.......................................... 5

2-59
Changing a bulb
..................................... 18

2-187
Changing a fuse
..................................... 1

8 8 -19 3
Changing a wheel

...............................
...175 -178
Changing a wiper blade
...............

............................................ 197
Changing the remote control battery ............................................... 60
Changing the time
.............................. 4

4, 46, 49
Checking levels

...................................... 21

3 -215
Checking the engine oil level
...............

......................................... 213
Checks
...............

.................................... 2 07-218
Children
...............................

... 149, 151, 155 -170
Child lock

...............................
........................170
Child seats

................... 1
55, 156, 160 -162, 169
Child seats, ISOFIX

...................................... 16

6
Cigarette lighter............................................... 92
Closing the boot

...............................
...............63
Closing the doors

...............................
.............62
Colour screen
....................... 2

50, 253, 290, 293
Connectors, audio
.............. 9

4, 278 -281, 304-305, 328 -329
Controls for air conditioning
...............................

........82, 84
Coolant
...............................

.............................35
Coolant level
..............................

...................214
Courtesy lamp, front

..................................... 13

8
Courtesy lamp, rear

...................................... 13

9
Cruise control
................................................ 12

0
Cup holder

...............................
........................90
CVT gearbox

......................................... 1
05, 217
bat

tery
...............................

.................... 194, 216
Battery, charging
...............................

............ 19 6
Battery, remote control

.............................6

0, 61
bl

uetooth (telephone)
....................2

37, 288, 308
bl

uetooth telephone
with voice recognition

.......................... 2

37-24 8
bo

nnet
...............

............................................ 207
bo

nnet stay
................................................... 2

07
b

oot
........

......................................................... 63
Boot lamp

...................................................... 14

0
Bottle holder

...............................

..................... 90
Brake discs

.................................................... 2

18
Brake lamps

...............................

................... 18 6
Brake pads
...............................

..................... 218
Braking assistance system

................

......................................... 142
bulb

s
(changing, type)
................................... 18

2-187
B
.
alphabetical index