Opel Astra 2004 Manuel D'utilisation page 35

Fuel filler neck for gas and petrol at right
rear of vehicle.
Remove natural gas filler cap.
When filling the vehicle with natural gas,
follow the operating and safety
instructions indicated at the filling
station.
The gas tank may only be filled at a
filling station with temperature
compensation at a maximum delivery
pressure of 250 bar.
The refuelling process must be fully
completed, e.g. ventilation of the filler
neck.
Refit the filler cap after refuelling.
Refuelling when driving abroad
When refuelling abroad, it should be noted that nationally specific terms are used for
natural gas vehicles or natural gas as a fuel (see table).
Natural gas vehicles
English NGVs = Natural Gas Vehicles
French Véhicules au gaz naturel ou
véhicules GNV
Italian Metano auto
33
Natural gas as fuel
CNG = Compressed Natural Gas
GNV = Gaz Naturel (pour)
Véhicules ou CGN carburant gaz
naturel
Metano (per auto)