I've got a audi a3 2.0 tdi 53 plate. Every few times I lock my car, the alarm will start beeping constantly for around 10 minutes. I've tried opening and closing the doors, boot, bonnet and holding the key fobs down but nothing seems to turn it off, I had the car on a vagcom this morning and the faults are reading - 0597 Alarm Horn fault, has anyone had this problem? Can anyone help please?