as i can fart louder than the alarm on my a3 im intrested in getting an aftermarket unit fitted or even a tracker for when it does go walkies. I dont want to chav it up with extra key fobs and loud beeps etc when i open it but i want something with a good reputation as i have forked out alot for the car and will not give it up without a fight so to speak. Any advise on good alarms or trackers ? Also why does the alarm go off when i jetwash the car ? Could this mean water is seaping into the car to set the interior sensors off ?