Aston Martin DB11 Owner's Handbook Manual page 44

2. Press the HomeLink button you want to program. the
HomeLink symbol should begin to slowly flash orange.
3. Press and hold the remote control for the device to be
programmed at a distance of 20 mm to 200 mm (1" to 9")
away from the HomeLink transmitter unit, keeping the
HomeLink symbol in view.
The distance between the remote control and the transmitter
unit depends on the system being programmed and several
attempts at different distances may be necessary.
2.18
Vehicle Security
4. Press and hold the remote control button until the
HomeLink symbol turns to either rapidly flashing or
continuously green.
Some markets require the remote control to time out after it's
button is pressed and held for a certain amount of time. If the
indicator light on the remote control goes off whilst
programming, press and release the remote control button every
2 seconds until te symbol changes to green.