The alert that sounds when you first insert the key, wont stop. Sounds weird!

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My Cabrio makes the alert sound - Beep,boop,beep - Beep,boop,beep - It Sounds like La Cucaracha when you first put in the key to start it. This morning it didn't stop. It keeps beeping and booping but sounds like it's under water. It's annoying to say the least