Opel MERIVA Owner's Manual page 49

Height adjustment
1. Pull belt out slightly.
2. Press button.
3. Adjust height and engage.
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 seat belt
To release belt, press red button on
belt buckle.
Seat belts on the rear seats
The centre rear seat is equipped with
a particular three-point seat belt.
Pull latch plates out of belt retainer in
roof.
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