See also:

ON
This is the normal operating position after the engine is started. ...

All new gearbox and Boxer engine
UK versions of the Subaru Impreza will be powered by an all new 4-cylinder 1.6 litre Boxer petrol engine and will be available with either a new five-speed manual transmission or Subaru's Lineartr ...

Unlocking the phonebook
1. Select the “PHBK UNLOCK”/“PHONEBOOK UNLOCK” menu. Then “CURRENT PIN?” is displayed. NOTE If the phonebook is not locked, “UNLOCK” is displayed and the mode changes to the security mode. ...