refuelling Citroen DS4 2010.5 1.G Owner's Manual

Fuel tank Capacity of the tank: approximately 60 litres.
Low fuel level
Refuelling
Additions of fuel must be of at least 5 litres to be registered by the fuel gauge. Opening the filler cap may result in an inrush of air. This vacuum is entirely normal and results
from the sealing of the fuel system.
 Press control A until the automatic opening of the fuel flap is heard. This control remains active for a few minutes after switching off the ignition. If necessary, switch the ignition on again to reactivate it.  Take care to select the pump that delivers the correct fuel for your vehicle.
 Introduce the nozzle so as to push in the metal non-return flap B.  Make sure that the nozzle is pushed in as far as possible before star ting to refuel (risk of blowback).  Maintain this position while refuelling.  Push the fuel flap to close it. If you are filling your tank to the top, do not persist after the third cut- off; this could cause your vehicle to malfunction.
When the low fuel level in the tank is reached, this warning lamp on
the instrument panel comes on, accompanied by an audible warning and a message in the screen. When it first comes on, around 6 litres of fuel remain in the tank. You must refuel as soon as possible to avoid running out.
With Stop & Star t, never refuel with the system in STOP mode; you must switch off the ignition with the key.