hi guys and gals. my battery in my 325i touring keeps going flat over night. i have tried a good 2nd hand battery and 2 new ones so i know the battery is not faulty. it charges fine when driving but leave it over night and the fecker's flat, totally flat. there are no lights on anywhere. this has me puzzled, please help as i've put alot of work into converting it from a 316i and would like some trouble free (ish) motoring.
cheers.
