I have a 2.0T premium package coupe with push button start/stop. I have noticed that most of the time when I stop the engine, the door chime alarms till I get out but, sometimes it doesn't? What does the door chime mean? the door is still closed! Is it to remind you to take the key fob with you? Does it have something to do with the headlights? Mine stays on "Auto" all the time. What is weird is sometimes it chimes and sometimes it doesn't. Any feedback?