When driving at highway speeds with the top down, the "door open" warning and interior lights come on and the door opens slightly ajar. can be either driver or passenger side. locked or unlocked. doors are securely closed beforehand. having researched this extensively, i know it is also an issue for other volvo owners. i have tried to lube the door latches as some have suggested, but this does not work. volvo and their dealers have stated they have "never heard" of this happening before, much to my frustration. this is a serious safety issue. a car door should not pop open while driving at any speed let alone on a highway.