Opel ASTRA K 2015 Owner's Manual page 263

2. Fold out the wheel wrench and
install ensuring that it locates
securely and loosen each wheel
nut by half a turn.
The wheels might be protected by
locking wheel nuts. To loosen
these specific nuts, first attach the
adapter for the locking wheel nuts
onto the head of the nut before
installing the wheel wrench. The
adapter is located in the glovebox.
3. Ensure the jack is correctly
positioned under the relevant
vehicle jacking point.
4. Set the jack to the necessary
height. Position it directly below
Vehicle care
the jacking point in a manner that
prevents it from slipping.
Ensure that the edge of the body
fits into the notch of the jack.
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