Opel ASTRA Owner's Manual page 31

4-door notchback
To unlock the boot lid, press button
x on the remote control for at least
2 seconds, or, to open from the inside,
press button x in the centre
console, the boot lid is opened
slightly.
With the doors centrally locked, the
boot lid cannot be opened with button
x in the centre console.
Keys, doors and windows
Closing
Use one of the interior handles.
Do not push the touchpad switch or
the emblem whilst closing as this will
unlock the tailgate again.
Central locking system 3 25.
29