Nah, I concur.. It sounds like a starter. The contact points are worn out. So as you keep trying the contacts move ever so slightly until they make contact and the starter works. Easy way to check, well on the X it is a little tough but give the starter a slight hit with a hammer. I am not saying whale on it, but give it a few taps and then try to start.

Another way to check is to use a multi meter and check for voltage. Should be 12 volts coming out. If it is, and power is getting to the starter, starter is dead.

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2011 E70 50i M Sport