How do you turn off the alarm on a 1999 Volkswagen Jetta?

If your Battery is low the alarm will go off. You can also pull the Neg. battery cable to reset. BUT have someone standing by the drivers door with the key in the door lock. It must be turned once the reconnection is made. This will reset the alarm. If that doesn't work you will need to look for broken or loose wires with a wire diagram of the alarm system.