Vauxhall Astra GTC Owner's Manual page 38

Seat inclination
Lever pumping motion
up = front end higher
down = front end lower
Lumbar support
Adjust lumbar support using the four-
way switch to suit personal
requirements.
Moving support up and down: push
switch up or down.
Increasing and decreasing support:
push switch forwards or backwards.
Seats, restraints
Adjustable thigh support
Pull the lever and slide the thigh
support.
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