I have a 2004 9-3 convertible with 130k miles. I've had this car for a few months and haven't had any sort of issues until yesterday. For some reason, the horn will sound 2-3 little chirps and the trunk will unlatch or vise versa. I cannot seem to figure out why this is happening. The only way I can get it to stop is if I leave the key in the ignition which is a pretty scary thing where I live as cars seem to be stolen right and left. Any suggestions or recommendations would be greatly appreciated!