Could someone please help me!
I have an A3 2.0 tdi 2003 and recently have been having a recurrent draining battery and i cannot find out why. i changed the battery and it went flat again in a week!I have taken the car to an auto electrician and he has struggled to find the cause. he has established that the resting amps from the battery is 0.8 after half an hour,which he felt was a bit high when apparently it should be under 0.4 but hasnt been able to find what it is causing it.

Im really starting to get frustrated with it, Audi grage could not find anything wrong with it either using their diagnostic computers!!!!!
is there a known common electrical fault or is it a matter of pulling the fuses out or something!the auto electrician felt it might be some computer in the side panel in the boot but wasnt sure and didnt fancy buying a new one to find out.