Vauxhall Astra 2022 Owner's Manual page 35

Backrest inclination
Turn handwheel. Do not lean on
backrest when adjusting.
Seat height
Lever pumping motion
up : seat higher
down : seat lower
Seats, restraints
Lumbar support
Adjust lumbar support using the
four-way switch to suit personal
requirements.
Press and hold the front or rear of the
switch to increase or decrease the
lumbar support.
Press and hold the top or bottom of
the switch to raise or lower the lumbar
support.
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