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      12-20-2010, 10:05 PM   #6
Ikendiken
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Drives: '13 E92 M3
Join Date: Nov 2010
Location: Arlington, VA

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Quote:
Originally Posted by DarienJim View Post
One thing I did not mention. . .several times I have gotten into the car after it was sitting over night and I hear what I think sounds either like a disk drive or a DVD player spinning in the dash. I always thought that was odd. Can't imagine that the car would be working on say the navigation while it is sitting idle.
That's because the system starts the bootup process when you unlock the car. You are just hearing the system initialization. Do you have comfort access?

Do you keep a charger cord plugged into the center console? Do you keep your car locked normally? It certainly sounds like something is slowly draining your battery. I have been able to kill a BMW battery by making nothing but short trips followed by long idle periods when I was traveling a lot, but not in the time frames you are describing.
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