I am sorry of this question has been addressed before, but I recently bought an E220D (2019). I am appalled by the fact that there seems to be no alarm. I was under the impression that each E220 vehicle comes with the alarm. Am I wrong? When I lock the car, I can see no flashing light. Also, if I leave a window open, lock the car and open the door from within, the alarm does not go off. What am I doing wrong?