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Practical information -> Checks for Your Citroen C4 Cactus SUV Second Generation (2018-2024)

Practical information  
If the level is close to or below the "MIN” mark, it  
is essential to top up.  
When the engine is hot, the temperature of this  
fluid 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.  
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.  
Diesel fuel additive (Diesel  
with particle filter)  
On reaching the minimum level in the  
particle filter additive tank, this warning  
lamp comes on fixed, accompanied by an  
audible warning and a message warning that the  
additive level is too low.  
Topping up  
This additive must be topped up without delay by  
a CITROËN dealer or a qualified workshop.  
12 V battery  
The battery does not require any  
maintenance.  
Once the pressure has dropped, remove the cap  
and top up to the required level.  
However, check regularly that the terminals  
are correctly tightened (versions without quick  
release terminals) and that the connections are  
clean.  
AdBlue (BlueHDi)  
An alert is triggered when the reserve level is  
reached.  
For more information on 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.  
Screenwash fluid  
Top up to the required level when  
necessary.  
For more information on the precautions  
to take before any work on the 12 V  
battery, refer to the corresponding section.  
Fluid specification  
The fluid must be topped up with a ready-to-use  
mixture.  
In winter (temperatures below zero), a liquid  
containing an agent to prevent freezing must  
be used which is appropriate for the prevailing  
conditions, in order to protect the elements of the  
system (pump, tank, ducts, jets, etc.).  
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.  
For more information on 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.  
Filling with pure water is prohibited under  
all circumstances (risk of freezing,  
limestone deposits, etc.).  
Passenger compartment  
filter  
Depending on the environment and the  
use of the vehicle (e.g. dusty atmosphere,  
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Practical information  
city driving), change it twice as often, if  
necessary.  
Following prolonged operation of the  
vehicle at very low speed or at idle, you  
may, in exceptional circumstances, notice the  
emission of water vapour at the exhaust on  
acceleration. This does not affect the  
brake discs and pads: braking efficiency may  
be reduced. Gently dab the brakes to dry and  
defrost them.  
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A clogged passenger compartment filter  
can adversely affect air conditioning  
system performance and generate  
undesirable odours.  
Brake disc/drum wear  
For any information on checking brake  
disc/drum wear, contact a CITROËN  
dealer or a qualified workshop.  
behaviour of the vehicle or the environment.  
New vehicle  
Air filter  
The first particle filter regeneration  
operations may be accompanied by a  
"burning" smell, which is perfectly normal.  
Depending on the environment and the  
use of the vehicle (e.g. dusty atmosphere,  
city driving), change it twice as often, if  
necessary.  
Parking brake  
If excessive travel or a loss of  
effectiveness of this system is noticed, the  
parking brake must be checked, even between  
two services.  
Manual gearbox  
The gearbox does not require any  
maintenance (no oil change).  
Oil filter  
This system must be checked by a CITROËN  
dealer or a qualified workshop.  
Change the oil filter each time the engine  
oil is changed.  
Automatic gearbox  
Wheels and tyres  
The pressure must be checked on all  
tyres, including the spare wheel, when the  
tyres are "cold".  
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.  
The gearbox does not require any  
maintenance (no oil change).  
Particle filter (Diesel)  
The start of saturation of the particle filter  
is signalled by the temporary illumination  
of this warning lamp, accompanied by a  
message warning of the risk of the filter clogging  
up.  
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.  
As soon as the traffic conditions permit,  
regenerate the filter by driving at a speed of at  
least 37 mph (60 km/h) until the warning lamp  
goes off.  
Driving with under-inflated tyres  
increases fuel consumption. Non-  
compliant tyre pressure causes premature  
wear on tyres and has an adverse effect on  
If the warning lamp stays on, this  
indicates a low Diesel additive level.  
For more information on Checking levels,  
refer to the corresponding section.  
After washing the vehicle, moisture, or in  
wintry conditions, ice can form on the  
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