Not something you really want to be doing but it’s not as simple as just removing the key from the dash with the introduction of the Smart Key for 2010:

START/STOP WHILE MOVING
Switching off the engine
With the gear selector in position P, press the engine START/STOP button. The engine will
stop and the ignition system will return to convenience mode.
Caution: It is not advisable to switch off the engine while the vehicle is moving. However,
if a situation arises where engine switch off is urgent, the following procedure applies:

1. Press the START/STOP button for a total of two seconds, or

2. Press the START/STOP button twice within two seconds.
With either method the warning message ‘Engine Stop Button Pressed’ will be displayed

Rolling restart
A rolling restart can be initiated by selecting transmission neutral position N and pressing
the engine START/STOP button. Now select D.