What scanning tool are you using ? The suggestion above about the convenience relay is a solid one.
When you turn the key take note you do not have to hold for the crank. A timer takes over and cranked xx seconds. The circuits that control that havw relay/s that if faulty could give you the symptoms you describe.
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2011 E70 • N55 (me)
2012 E70 • N63 (wife)
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