Vauxhall ASTRA Owner's Manual page 66

Adjusting the backrest
To adjust, turn side handwheel on the seat
while releasing the load on the backrest.
Move backrest to suit seating position.
Adjusting the seat height 3
To adjust, operate lever on the outside of
the seat.
Pump action on lever
Up: Seat higher
Down: Seat lower
Seats, interior
Adjusting the seat angle 3
To adjust, pull the lever on the front of the
seat, adjust the angle and release the
lever.
The seat should engage perceptibly.
Adjust the inclination by distributing body
weight.
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