Hello,
The battery of my Audi A6 runs down whenever I park it for even a day without using it. I was told that there is a leakage somewhere, I never leave anything on that could drain the battery apart from the factory fitted security. What could be wrong? CC: Sienna
Thanks

I imported the car from the USA and have been using the battery that came with it. Till it first ran down, I was told the battery was dead and bought a brand new one and the same incident occurred again.The Audio equipment is the original OEM unit, it came with the car although since you brought up the issue of the audio system I noticed for some time before the battery started to drain down that after whenever I put on my radio I hear a snowy sound from one of the speakers and it doesnt subside even when the car is put off for some few seconds although not as loud as when the car is on.

I had this same issue on my ford explorer. There is definitely something drawing current while the car is parked. Stop gap solution is to remove the positive battery head when the car will be parked for a day or more. To detect the actual fault, you will need a technician with a voltmeter to trace the fault. In the absence of that, one with wires and light bulb will do. Park the car with engine turned off, then test which equipment is still drawing current. Its a simple procedure that you can do if you have the equipment.