Central locking programming ?

Hello, the Saab 9-5 (Bauj. 2007) of a friend locks the central lock automatically after starting the engine or after driving off. Is the function programmable ? If yes – it has to be done with the programming device ? With our Opel Vectra C this function could be activated with the key and the pressing of the locking button – is it exactly so with the 9-5 ? Thank you ! Marco