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Checks -> Checking levels for Your Citroen Ds4 SUV Second Generation (2021-2025)

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Checks  
Checking levels  
Check all of these levels regularly and top them up if necessary, unless otherwise indicated.  
If a level drops significantly, have the corresponding system checked by a CITROËN dealer or a qualified workshop.  
Brake fluid level  
When working under the bonnet, take  
care, as certain areas of the engine  
may be extremely hot (risk of burns).  
The brake fluid level should be close  
to the "MAX" mark. If it is not, check  
the brake pad wear.  
Oil level  
The reading will only be correct if  
the vehicle is on level ground and  
the engine has been off for more than  
30 minutes.  
Engine oil change  
Refer to the servicing booklet for the interval for  
this operation.  
In order to maintain the reliability of the engine  
and emission control system, the use of  
additives in the engine oil is prohibited.  
Changing the ßuid  
Refer to the Maintenance and Warranty Guide  
for the interval for this operation.  
The check is carried out either when the ignition  
is switched on using the oil level indicator in the  
instrument panel, or using the dipstick.  
Oil speciÞcation  
Fluid speciÞcation  
It is normal to top up the oil level  
between two services. CITROËN  
recommends that you check the oil  
level, and top up if necessary, every  
3 000 miles (5 000 kilometres).  
The oil must correspond to your engine  
and conform to the manufacturer's  
recommendations.  
The brake fluid must conform to the  
manufacturer's recommendations and meet  
the DOT4 standard.  
 
Power steering fluid level  
Screenwash/headlamp wash  
level  
The power steering fluid level should  
be close to the "MAX" mark. Unscrew  
the cap, with the engine cold,  
to check the level.  
In addition, as the cooling system is pressurised,  
wait at least one hour after switching off the engine  
before carrying out any work.  
To avoid any risk of scalding, unscrew the cap  
by two turns to allow the pressure to drop.  
When the pressure has dropped, remove  
the cap and top up the level.  
To check the level or top up the  
fluid on vehicle fitted with headlamp  
washers, immobilise the vehicle and  
switch of the engine.  
Coolant level  
Changing the coolant  
The coolant does not have to be changed.  
The coolant level should be close  
to the "MAX" mark but should never  
exceed it.  
When the engine is warm, the  
temperature of the coolant is regulated by the  
fan. This can operate with the ignition off.  
On vehicles which are fitted with a particle  
emission filter, the fan may operate after  
the vehicle has been switched off, even if  
the engine is cold.  
Coolant speciÞcation  
The coolant must conform to the  
manufacturer's recommendations.