went to a restaurant last night parked up, locked car and as usual the only thing that happens is central locking operates no bleeps or hazards, its been like that since I bought it last year. when we were going home my girlfriend was driving I forgot to put my seatbelt on not for the first time and the occupancy alarm started it has never done that before for the passenger seat . when we got home I locked the car and the hazard lights flashed for the first time ever and the do it every time I lock it now. I cant work out how those options have just started working ?