Vauxhall Astra Owner's Manual page 44

Adjust the height so that the belt lies
across the shoulder. It must not lie
across the throat or upper arm.
Do not adjust while driving.
Removing
To release belt, press red button on
belt buckle.
Seat belts on the rear seats
The seat belt for the rear centre seat
can only be withdrawn from the
retractor if the backrest is in the rear
position.
Seats, restraints
Using the seat belt while
pregnant
9 Warning
The lap belt must be positioned as
low as possible across the pelvis
to prevent pressure on the
abdomen.
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