Opel ASTRA 2014 Owner's Manual page 45

9 Warning
Never store any subjects under
the seats.
Drive only with engaged seats and
backrests.
Seat positioning
Pull handle, slide seat, release
handle.
Seat backrests
Pull lever, adjust inclination and
release lever. Allow the backrest to
engage audibly.
Seats, restraints
Seat height
Lever pumping motion
up = seat higher
down = seat lower
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