Vauxhall Astra Owner's Manual page 62

There must not be any objects on the
bicycles that could become loose
during transportation.
Caution
Do not attach bicycles with carbon
pedal cranks to bicycle carriers.
The bicycles might get damaged.
Extending
Open the tailgate.
9 Warning
No-one should be in the extension
zone of the rear carrier system,
risk of injury.
Pull release lever up. The system
disengages and travels quickly out of
the bumper.
Storage
Completely pull out the rear carrier
system until you hear it engage.
Ensure that it is not possible to push
in the rear carrier system without
pulling the release lever again
9 Warning
It is only permissible to fit objects
to the rear carrier system if the
system has been correctly
engaged. If the rear carrier system
will not engage correctly, do not fit
objects to the system and slide the
system back. Seek the assistance
of a workshop.
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