Vauxhall Astra Owner's Manual page 209

Alloy wheels 3 : Prise off the hub cap
using a screw driver, positioning the
screwdriver at the recess at the side of
the hub cap.
Remove wheel bolt ca ps 3 from wheel
bolts.
Alloy wheels with anti-theft lock 3 :
Release hub cap using key includ ed in
vehicle tools and rem ove it.
2. Slacken wheel bolts using wheel bolt
wrench, putting on wheel bolt wrench as
far as possible.
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