Opel COMBO Owner's Manual page 9

Seat adjustment
Longitudinal adjustment
Pull handle, slide seat, release
handle. Try to move the seat back and
forth to ensure that the seat is locked
in place.
Backrests inclination
Push the lever and adjust the
inclination. Do not lean on backrest
when adjusting.
In brief
Seat height
Lever pumping motion
up : seat higher
down : seat lower
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