My A3 has a battery drain problem and I am in need of an auto electrician to source where it is coming from. If I leave it anywhere past 3 days the battery doesn't ahve enough power to start. It is definately not the battery, I had it tested and it was fine, as a gesture of good will they replaced it with a brand new one and it still does it (it's a bosch silver 820 amp one!). So, does anyone know of a good garage that will check this out for me? I am in Bristol.