Opel CORSA Owner's Manual page 45

Height adjustment
1. Pull belt out slightly.
2. Shift the height adjustment
upwards or press button to
disengage and push the height
adjustment downwards.
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.
Seats, restraints
Removing
To release belt, press red button on
belt buckle.
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