the other day i went to go turn on my 08 e90 n54 and he started up. after about 10 seconds, he just died. everything shut off and my key even got stuck in the ignition. the next day i gave him a jump and he ran fine but then the morning after, i went to go start him up but he was dead. i tried jumping it up 3 times today but still no juice. not even one light. my battery was just replaced a few weeks ago. whats going on?