Vauxhall ASTRA Owner's Manual page 204

Fuel filler cap
If replacing the fuel filler cap, be sure to use
a genuine fuel filler cap for your model to
ensure full functionality. Diesel-engined
vehicles have special fuel filler caps.
Refuelling
9
Warning
Care must be taken when handling fuel.
Before refuelling, switch off the engine
and where applicable any auxiliary
heating with combustion chambers
(see sticker on fuel filler cap). Switch off
mobile phones.
Driving and operation
Fuel filler neck at right rear side of vehicle.
The tank flap is locked together with the
doors, see page 40.
Open the tank flap.
Unscrew the fuel filler cap, remove and
suspend from the tank flap.
The fuel tank has a limiting system which
prevents overfilling of the tank.
203