BMW 5 Series - Battery Problem
I bought my BMW 520 (first registration Sep 01) in Nov 2008. In Jan 09, the battery was going flat often. Since then, the battery has been changed 4 times, alternator changed twice and an electrician has checked the drainage system but i tried starting the car yesterday after a new battery was fitted on Thursday 31st Dec 09 and it was flat. I dont know what to do now. Help.