Something a mechanic told me about the warning buzzer was that when you first turn on the key the buzzer will sound then go off and that if you do turn the key on and you don't hear the buzzer it is telling you something very important. It is telling you the buzzer warning system is not working properly and it won't be warning you if a over heating or low oil situation should occur.
If you don't hear the buzzer on initially turning the key on you should be getting things checked out.
“There is no difference between communism and socialism, except in the means of achieving the same ultimate end: communism proposes to enslave men by force, socialism—by vote. It is merely the difference between murder and suicide.” Ayn Rand