From what I read it would just have a solid voltage like millions of cars without BMW's voodoo... It should not have caused battery to go low.. Again from what I read but there's a lot of information in there so its possible I missed something or misunderstood something.
Either way charging battery should bring it back to life.. But you should get yourself a cheap mulitmeter. You can get one for ten dollars at Wal-Mart.. So you can see what your voltage at battery and once you get car started what running voltage is ..
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