I have a 2002 Audi Quattro A6 3.0 And my battery drains over night if the car is not cranked. I had my battery tested yesterday and they said it was a good battery however I got ready to leave for work this morning and could not crank the car I had to get someone to give me a jump for the 3rd time this week can someone please help me figure out why this keeps happening it is so inconvenient and a real headache. I was told that a fuse should not drain my battery but it seems that way.