Aston Martin DB11 Owner's Handbook Manual page 36

Hands-Free Access
Warning: Make sure there is sufficient clearance under
the rear of the vehicle and that you stand on firm ground. It
is possible you could lose your balance on some surfaces,
such as on ice.
Warning: The vehicle exhaust system can become very
hot. To prevent injury make sure you only move your foot in
the detection range of the sensors .
Caution: Do not touch the bumper when you move your
foot to operate the system. If you do, you can cause damage
the bumper.
The hands-free access system may not function correctly if
there is a build-up of dirt, road salt or snow around the sensors.
It is possible the deck lid could be released unintentionally,
such as when the rear bumper is being cleaned, or in an
automatic car wash. Do not carry the vehicle key with you in such
situations. This will prevent unintentional opening or closing of
the deck lid.
2.10
Vehicle Security
Hands-free access can be used to release the catch for the deck
lid. To operate, quickly move your foot under the rear bumper.
For the hands-free access system to operate:
• The vehicle key must be in the rear Keyless Go detection area
of the vehicle (Refer to 'Keyless Go Zones', page 2.5).
• The engine must not be running.
If the deck lid does not release after several attempts, wait at
least 10 seconds before you try again.
If you hold your foot under the bumper for too long, the deck lid
will not release.