Vauxhall ASTRA Owner's Manual page 107

106 Seats, interior
Have the cause of the fault eliminated
immediately by a workshop.
9
Warning
The roof cannot be closed or opened if
the anti-roll bars are extended. The
anti-roll bars must first be retracted.
After deployment of the anti-roll bar,
have the system repaired by a workshop
immediately.
Manually retracted anti-roll bars will not
deploy in the event of a collision.
Note
z Do not place any objects on the covers of
the anti-roll bars behind the head
restraints. They would be propelled
through the vehicle in an uncontrolled
fashion should the anti-roll bars deploy.
Such objects could also prevent the
anti-roll bars from extending.
z Do not operate the roof while the anti-roll
bars are extended. Parts of the roof
could be damaged during such
operation.
z Deployment of the anti-roll bars is
indicated by illumination of control
indicator v.
z If an attempt is made to operate the roof
while the anti-roll bars are extended, a
continuous signal will sound as a
warning.