My 2012 Ford Focus Titanium went nuts when my wife approached it with the keyless device. My wife called me into the garage since she thought someone was in the car or something trying to get out. It turned out the audio system was make a super loud drumming type sound. This was so loud, it was shocking, especially when you open the doors. I got my camera and filmed getting into the car, starting it, and stopping the car. Later, when the lights on the car went out, the sound stopped. I've put the video on Youtube here: http://youtu.be/ZKISw8RcUFw
Needless to say, this seems pretty serious and I don't want it to happen while driving or when we are away from home.
Has anyone ever heard of this? I think the dealer is going to just ask me to reproduce it which we know wont happen when its there (which is why I filmed it in the first place).