Opel Astra Owner's Manual page 22

20 In brief
to position P before removing
the ignition key. On an uphill
slope, turn the front wheels
away from the kerb.
If the vehicle is on a downhill
slope, engage reverse gear or
set the selector lever to position
P before removing the ignition
key. Turn the front wheels
towards the kerb.
■ Close the windows and the
sunroof.
■ Remove the ignition key. Turn
the steering wheel until the
steering wheel lock is felt to
engage.
For vehicles with automatic
transmission, the key can only
be removed when the selector
lever is in position P.
■ Lock the vehicle with button e on
the radio remote control.
Activate the anti-theft alarm system
3 29.
■ The engine cooling fans may run
after the engine has been switched
off 3 223.
■ After running at high engine speeds
or with high engine loads, operate
the engine briefly at a low load or
run in neutral for
approx. 30 seconds before
switching off, in order to protect the
turbocharger.
Keys, locks 3 21, Laying the vehicle
up for a long period of time 3 222.