Alfa Romeo Giulia Owner's Handbook Manual page 135

WARNING
124) Do not apply any object/plug to the
end of the filler which is not provided for the
car. The use of non-compliant objects/plugs
could cause a pressure increase inside the
tank, resulting in dangerous situations.
125) Do not bring naked flames or lit
cigarettes near to the fuel filler: fire risk.
Keep your face away from the fuel filler to
prevent breathing in harmful vapours.
126) Do not use a mobile phone near the
refuelling pump: risk of fire.
133