My 2010 gen three has a beeper that sounds when I leave the car with ignition on and my keys in my pocket, The siren appears to be mounted near the base of the right hand side a pillar. I want to use this siren for another purpose. What I would like to do is to have a switch inside the car that allows this siren to beep when the switch is on, the purpose of this is when I am in areas that are heavily pedestrianised. Many times I have had people walk out in front of me whilst in our town centre. Does anybody know if it is possible to do what I am asking? iPhone ?