Vauxhall movano Owner's Manual page 45

Suspension seat height
Pull up front release lever up to adjust
height of front part of seat.
Pull up rear release lever to adjust
height of rear part of seat.
Lumbar support
Adjust lumbar support to suit personal
requirements.
Increasing and decreasing support:
turn the handwheel while relieving the
load on the backrest.
Seats, restraints
Suspension seat lumbar support
Adjust lumbar support to suit personal
requirements.
Operate hand pump repeatedly
(located on underside of unit) to
increase firmness.
Press release button (located at front
of unit) to decrease firmness.
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