2023 CITROEN C4 oil level

171
Practical information
7Electric motor

1.Screenwash fluid reservoir
2. Engine coolant reservoir (level only)
3. Brake fluid reservoir
4. Battery/Fuses
5. Fusebox
6. 400
V electrical circuit
7. Emergency circuit-breaker for emergency
services and maintenance technicians
For more information on the Charging system
(Electric), refer to the corresponding section.
Checking levels
Check all of the following levels regularly in
accordance with the Manufacturer's service
schedule. Top them up if required, unless
otherwise indicated.
If a level drops significantly, have the
corresponding system checked by a CITROËN
dealer or a qualified workshop.
The fluids must comply with the Manufacturer's requirements and with
the vehicle's engine.
Take care when working under the bonnet, as certain areas of the engine
may be extremely hot (risk of burns) and the
cooling fan could start at any time (even with
the ignition off).
Used products
Avoid prolonged contact of used oil or fluids with the skin.
Most of these fluids are harmful to health and
very corrosive.
Do not discard used oil or fluids into
sewers or onto the ground.
Empty used oil into the containers reserved
for this purpose at a CITROËN dealer or a
qualified workshop.
Engine oil
The level is checked, with the engine having been switched off for at least 30
minutes and on level ground, either using the oil
level indicator in the instrument panel when the
ignition is switched on (for vehicles equipped
with an electric gauge), or using the dipstick.
It is normal to top up the oil level between two
services (or oil changes). It is recommended
that you check the level, and top up if necessary,
every 3,000 miles (5,000 km).
In order to maintain the reliability of the
engine and emissions control system,
never use additives in the engine oil.
Checking using the dipstick
For the location of the dipstick, please refer
to the illustration of the corresponding engine
compartment.
►

Grasp the dipstick by its coloured grip and
pull it out completely

.
►

Wipe the end of the dipstick using a clean,
lint-free cloth.


► Reinsert the dipstick and push fully down,
then pull it out again to visually check the oil
level: the correct level is between marks A
(max)
and B (min).
Do not start the engine if the level is:
–

above mark
A: contact a CITROËN dealer or a
qualified workshop.
–

below mark B

: top up the engine oil
immediately.

172
Practical information
Oil grade
Before topping up or changing the
engine oil, check that the oil is suitable
for your engine and complies with the
recommendations in the service schedule
supplied with the vehicle (or available from
your CITROËN dealer or qualified workshop).
Use of non-recommended oil may invalidate
your warranty in the event of engine failure.
Topping up the engine oil level
For the location of the engine oil filler cap, please
refer to the corresponding engine compartment
illustration.
►

Add oil in small quantities, avoiding any spills
on engine components (risk of fire).
►


W
ait a few minutes before checking the level
again using the dipstick.
►

T
op up the level if necessary.
►

After checking the level, carefully screw the
oil filler cap back on

and replace the dipstick in
its tube.
The oil level indication displayed on the instrument panel when the ignition is
switched on is not valid for 30 minutes
following an addition of oil.
Brake fluid
The level of this fluid should be close to
the "MAX" mark. If not, check the brake
pads for wear.
To know how often the brake fluid should be
replaced, refer to the manufacturer's servicing
schedule.
Clean the cap before removing it to refill.
Use only DOT4 brake fluid from a sealed
container.
Engine coolant
(Petrol or Diesel)
It is normal to top up this fluid between
two services.
The check and top-up must only be done with
the engine cold.
A level of coolant that is too low risks causing
major damage to the engine; the coolant level
must be close to the "MAX" mark without ever
going above it.
If the level is close to or below the " MIN" mark, it
is essential to top it up.
When the engine is hot, the temperature of the
coolant is regulated by the fan.
As the cooling system is pressurised, wait at
least one hour after switching off the engine
before carrying out any work.
In order to avoid the risk of scalding if you need
to top up in an emergency, wrap a cloth around
the cap and unscrew the cap by two turns to
allow the pressure to drop.
Once the pressure has dropped, remove the cap
and top up to the required level.
(Electric)
Do not top up the coolant.
If the level is close to or below
the "MIN" mark, it is essential to contact a
CITROËN dealer or a qualified workshop.
Screenwash fluid
Top up to the required level when necessary.
Fluid specification
The fluid must be topped up with a pre-mixed
product.
In winter (temperatures below zero), a fluid
containing an anti-freeze agent which is
appropriate for the temperature conditions
must be used in order to protect the system's
components (pump, tank, ducts, jets).
Filling with pure water is prohibited in all
circumstances (risk of freezing,
limescale, etc.).

173
Practical information
7AdBlue® (BlueHDi)
An alert is triggered when the reserve level is
reached.
For more information on the Indicators and in
particular the AdBlue range indicators, refer to
the corresponding section.
To avoid the vehicle being immobilised in
accordance with regulations, you must top up the
AdBlue tank.
For more information on AdBlue
® (BlueHDi),
and in particular the supply of AdBlue, refer to
the corresponding section.
Checks
Unless otherwise indicated, check these
components in accordance with the
Manufacturer's service schedule and according
to your engine.
Otherwise, have them checked by a CITROËN
dealer or a qualified workshop.
Only use products recommended by
CITROËN or products of equivalent
quality and specification.
In order to optimise the operation of
components as important as those in the
braking system, CITROËN selects and offers
very specific products.
12 V battery
The battery does not require any maintenance.
Check regularly that the terminals are correctly
tightened (versions without quick-release
terminals) and that the connections are clean.
For more information on the precautions
to take before any work on the 12 V
battery, refer to the corresponding section.
Versions equipped with Stop & Start are
fitted with a 12 V lead-acid battery of
specific technology and specification.
Its replacement should be carried out only by
a CITROËN dealer or a qualified workshop.
Passenger compartment
filter
Depending on the environment and the
use of the vehicle (e.g. dusty atmosphere,
city driving), change it twice as often, if
necessary .
A clogged passenger compartment filter
can adversely affect air conditioning
system performance and generate
undesirable odours.
Air filter
Depending on the environment and the
use of the vehicle (e.g. dusty atmosphere,
city driving), change it twice as often, if
necessary .
Oil filter
Change the oil filter each time the engine
oil is changed.
Particle filter (Diesel)
/ The start of clogging of the
particle filter is indicated by the
temporary lighting of this warning lamp,
accompanied by an alert message.
As soon as traffic conditions allow, regenerate
the filter by driving at a speed of at least 37
mph
(60

km/h), with an engine speed above 2,500
rpm, for about 15 minutes (until the warning lamp
goes out).
If it is not possible to reach 37
mph (60 km/h),
leave the engine running at idle for about 15
minutes, then drive with an engine speed above
2,500 rpm for 15 minutes.
Do not switch off the engine until the filter
is fully regenerated; repeated intervals
can degrade the engine oil prematurely.
Regenerating the filter while the vehicle is
stationary is not recommended.

174
Practical information
Following prolonged operation of the
vehicle at very low speed or at idle, you
may, in exceptional circumstances, notice
water vapour coming from the exhaust while
accelerating. These emissions have no
impact on the vehicle’s behaviour and the
environment.
New vehicle
During the first few particle filter
regeneration operations, you may notice a
"burning" smell. This is perfectly normal.
Manual gearbox
The gearbox does not require any maintenance (no oil change).
Automatic gearbox
The gearbox does not require any maintenance (no oil change).
Drive selector
The drive selector does not require any maintenance.
Manual parking brake
If you notice excessive brake lever travel
or decreased effectiveness, the parking
brake must be adjusted, even between two
services.
This system must be checked by a CITROËN
dealer or a qualified workshop.
Electric parking brake
This system does not require any routine servicing. However, in the event of a
problem, do not hesitate to have the system
checked by a CITROËN dealer or a qualified
workshop.
For more information on the Electric
parking brake, refer to the
corresponding section.
Brake pads
Brake wear depends on the style of
driving, particularly in the case of vehicles
used in town, over short distances. It may be
necessary to have the condition of the brakes
checked, even between vehicle services.
Unless there is a leak in the circuit, a drop in the
brake fluid level indicates that the brake pads
are worn.
After washing the vehicle, moisture, or in wintry conditions, ice can form on the
brake discs and pads: braking efficiency may
be reduced. Gently dab the brakes to dry and
defrost them.
Brake disc/drum wear
For any information on checking brake
disc/drum wear, contact a CITROËN
dealer or a qualified workshop.
Wheels and tyres
The inflation pressure of all tyres, including the spare wheel, must be
checked on "cold” tyres.
The pressures indicated on the tyre pressure
label are valid for "cold" tyres. If you have driven
for more than 10 minutes or more than 6 miles
(10 kilometres) at over 31 mph (50
km/h), add
0.3 bar (30 kPa) to the values indicated on the
label.
Under-inflation increases energy
consumption. Non-compliant tyre
pressures cause tyres to wear prematurely
and have an adverse effect on the vehicle's
road holding - risk of accident!
Driving with worn or damaged tyres reduces the
braking and road holding performance of the
vehicle. Regularly check the condition of the
tyres (tread and sidewalls) and rims as well as
the presence of the valve caps.
When the wear indicators no longer appear set
back from the tread, the depth of the grooves is
less than 1.6 mm; replace the tyres as soon as
possible.
Using different size wheels and tyres from those
specified can affect the lifetime of tyres, wheel
rotation, ground clearance, the speedometer
reading and have an adverse effect on road
holding.
Fitting different tyres on the front and rear axles
can cause the ESC to mistime.

272
Alphabetical index
Charger, wireless 60
Charging cable
157
Charging cable (Electric)

156
Charging connector (Electric)

155, 160,
162–163
Charging flap (Electric)

155, 160, 162–163
Charging system (Electric)

5, 9, 28, 153, 171
Charging the traction battery
(Electric)

23, 153, 157, 160, 162–163
CHECK

24
Checking the engine oil level

20
Checking the levels

171–172
Checking tyre pressures
(using the kit)

181, 183
Checks

170, 173–175
Checks, routine

173–174
Child lock

92
Children

81, 87–89
Children (safety)

92
Child seats

81, 84–87
Child seats, conventional

87, 90–91
Child seats, i-Size

89–91
Child seats, ISOFIX

87–91
Cleaning (advice)

154, 177–179
Closing the boot

36, 40
Closing the doors

35–36, 39
Collision Risk Alert

132–134
Configuration, vehicle

11, 28–29
Connected applications

239
Connection, Android Auto

221, 239
Connection, Apple CarPlay

221, 238Connection, Bluetooth 208–209, 218–219,
239–240, 244–245, 260–261
Connection, Wi-Fi network

240
Connectivity

238, 265
Consumptions

29–30
Container, AdBlue®

176
Control, emergency boot release

40
Control, emergency door

37
Control, heated seats

47, 50–51
Controls, steering mounted

102–103
Control stalk, lighting

65–66
Control stalk, wipers

70–72
Control unit

156–157
Courtesy lamps

62–63
Cruise control

113–114, 116–118
Cruise control, adaptive

113–114, 118–119
Cruise control by speed limit
recognition

113–114
D
DAB (Digital Audio Broadcasting) -
Digital radio
207, 217, 242
Date (setting)

224, 247, 266
Daytime running lamps

66, 188
Deactivating the passenger airbag

83, 86
Deadlocking

33, 36
Deferred charging

30
Deferred charging (Electric)

28, 30,
155, 160, 163
Deferred charging (Rechargeable hybrid)

30
Defrosting 48, 57
Defrosting, front
57
Defrosting, rear screen

58
Demisting

48, 57
Demisting, front

57
Demisting, rear

58
Diagnosis, vehicle

24
Dials and gauges

10
Digital instrument panel

11
Dimensions

202
Dipstick

20, 171
Direction indicators (turn signals)

66, 188–189
Display, head-up

12
Display screen, instrument panel

10
Domestic charging
(Electric)

157, 162–163, 201
Doors

39
Drive, electric

5, 9, 23, 28, 30,
153, 164, 171, 192, 195, 201
Driver’s attention warning

136–137
Drive selector (Electric)

103, 174
Driving

93–94
Driving aids camera (warnings)

11 0
Driving aid shortcuts

111
Driving aids (recommendations)

109
Driving economically

8
Driving modes

104–105
Dynamic stability control (DSC)

78

273
Alphabetical index
E
EBFD 77
Eco-driving (advice)
8
ECO mode

105
Electric windows

42
Electronic brake force distribution (EBFD)

77
Emergency braking assistance (EBA)

78
Emergency call

75–76
Emergency switching off

97–98
Emergency warning lamps

74, 180
Emissions control system, SCR

22, 175
Energy economy (mode)

168
Energy economy mode

168
Energy flows

23, 28, 30
Energy recovery

23, 104
Engine

175
Engine compartment

170
Engine, Diesel

152, 170, 180, 200
Engine, petrol

170, 198
Engines

197–198, 200
Environment

8, 38, 94
ESC (electronic stability control)

77
Expanded traffic sign recognition

11 4
Exterior lighting

68
F
Fatigue detection 136–137
Favourite driving functions
111
Filling the AdBlue® tank

173, 176
Filling the fuel tank 152–153
Filter, air
173
Filter, oil

173
Filter, particle

173
Filter, passenger compartment

51, 173
Fitting a wheel

185–186
Fitting roof bars

167–168
Fittings, boot

63
Fittings, interior

59
Flap, fuel filler

152–153
Flashing indicators

66, 188
Floor, boot, adjustable

63
Fluid, brake

172
Fluid, engine coolant

172
Foglamp, rear

65, 190
Foglamps, front

65, 70, 189
Foglamps, rear

191
Folding the rear seats

49–50
Frequency (radio)

241, 263
Fuel

8, 152
Fuel consumption

8
Fuel level, low

152
Fuel (tank)

152–153
Fuses

191
G
Gauge, fuel 152
Gearbox, automatic
101–103, 105, 174, 192
Gearbox, manual

101, 105, 174
Gear lever, manual gearbox

101
Gear shift indicator 106
Glove box
59
G.P.S.

235
H
Hazard warning lamps 74, 180
Headlamps (adjustment)
67
Headlamps, automatic dipping

69–70
Headlamps, automatic operation

67
Headlamps, dipped beam

188
Headlamps, halogen

67, 188
Headlamps, main beam

69, 188
Head restraints, front

45
Head restraints, rear

49–50
Head-up display

12
Heated steering wheel

47
Heating

51–52
Heating, programmable

30, 58
Hi-Fi system

61
High voltage

153
Highway Driver Assist

11 8
Hill start assist

105–106
Histogramme, fuel consumption

29–30
Horn

75
I
Ignition 97, 245, 265
Ignition on
97

274
Alphabetical index
Immobiliser, electronic 95
Indicator, AdBlue® range
21
Indicator, coolant temperature

21
Indicator, engine oil level

20
Indicators, direction

66, 188
Indicator, service

19
Inflating tyres

174, 203
Inflating tyres and accessories
(using the kit)

181, 183
Information, vehicle

10, 268
Infrared camera

11 0
Instrument panel

10, 26, 111
Instrument panel, LCD

10
Internet browser

236, 239
ISOFIX mountings

87, 90–91
J
Jack 181, 184, 242
Jump starting
192
K
Key 32, 34, 37
Key, electronic
35–36
Keyless Entry and Starting

32, 34–36, 96–97
Key not recognised

97–98
Key with remote control

32, 95
Kit, hands-free

208–209, 218–219, 244, 260
Kit, puncture repair

181
Kit, temporary puncture repair 180–183
Klaxon
75
L
Labels, identification 202
Lamps, parking
66
Lamps, rear

189–190
Lamps with Full LED technology

70
Lane assist

118, 123–125
Lane keeping assist

128
Leather (care)

179
LEDs - Light-emitting diodes

66, 188–189
Level, AdBlue®

173
Level, brake fluid

172
Level, Diesel additive

173
Level, engine coolant

21, 172
Level, engine oil

20, 171
Levels and checks

170–172
Level, screenwash fluid

71, 172
Light-emitting diodes - LEDs

66, 188–189
Lighting, boot

64
Lighting, cornering

70
Lighting dimmer

25
Lighting, exterior

65, 68
Lighting, guide-me home

33, 67–68
Lighting, interior

62–63
Lighting, mood

63
Lighting, welcome

67–68
Loading

167–168
Load reduction mode

169
Locking 33–35
Locking from the inside
36
Locking the doors

36–37
Log, alerts

24
Lumbar

46
M
Mains socket (domestic network) 156
Maintenance (advice)
154, 177
Maintenance, routine

110, 173, 175
Manoeuvring aids (recommendations)

109
Map reading lamps

62
Markings, identification

202
Massage function

46
Mat

62, 110
Menu, main

28
Menus (audio)

205, 214–215, 228–229
Menu, shortcuts

28–29
Messages

246
Messages, quick

246
Minimum traction battery charge level
(Electric)

23
Mirror, rear view

48
Mirrors, door

48, 58, 131
Mirror, vanity

59
Misfuel prevention

153
Mobile application

30, 58, 163
Motor, electric

98, 171, 201
Mountings, ISOFIX

87, 90–91
Multimedia support

60