The car alarm to our 1987 420 mercedes will not stop. We know that if all the doors are not shut properly when it is locked, that when you return to unlock the doors and get in, it sets off the alarm. Today it will not shut off. This is the first morning since we’ve owned the car that it was cold enough to freeze the doors shut. Could this have something to do with the problem? Anyway how do I make it stop so I can drive the car?