Well, a lot of us have the mystery beep that happens every once in a while. I had mine happen a couple of times the other day and thought I saw an "ajar". The thing beeped usually when going over a bump or sometimes during a tight turn. Finally I saw the message. It was the trunk. It was shut, but I think the switch is a little faulty. It happens so fast that the message center doesn't normally show the message. I opened it and re-shut and the beeping didn't re-occur as testing over some speed bumps.
I am sure there are other phantom beeps, but I think that is what mine is.
I am sure there are other phantom beeps, but I think that is what mine is.