Aston Martin DB11 Owner's Handbook Manual page 263

Fuel Filler Bowl
To stop water gathering in the fuel filler bowl and flowing into the
fuel tank, the fuel filler bowl has a pipe to let the water drain from
the bowl. During fuel filling, check and make sure that any debris
which may block the pipe is removed.
Fuel Cut-Off
In the event of a vehicle accident the vehicle electronics will
enter crash mode. Power to the fuel pumps will stop, thereby
reducing fire risk.
Fuel Filler Flap Emergency Release
To manually unlock the fuel filler flap:
1. The right side carpet for the luggage compartment (1) must
be moved. Release the two fasteners (2) that attach the
carpet and disconnect the luggage compartment lamp (3).
Move the carpet.
Maintenance and Technical Data
12.61