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      01-25-2013, 04:03 PM   #83
noka
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Drives: 2013 x35i M-Sport
Join Date: Dec 2012
Location: MA

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Quote:
Originally Posted by woodchuck1 View Post
I had a car in storage that would run down the battery every month or two if not started. It turned out that leaving the headlight switch in the "automatic" position will drain the battery over a period of several weeks. I turned the switch to "off" and the slow battery drainage ceased.
How did you find that? Any clue why that is? I had a '06 750i driver's side door handle (w/comfort access) that drained my battery every few days. Took a while for them to locate the drain. They had to do some extensive drain tests over ~48 hr period or so but were able to finally pinpoint it. However, this was considered a h/w failure and they replaced it. I wonder if you're headlamp switch is defective, if indeed that really was the root cause. You might want to have the dealer check.
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2013 x35i (Space Gray, MSport, CW/CWII, DHP, Premium, Premium Sound, Technology, BMW-Apps)
Retired: '09 C300 4Matic, '09 GTI, '06 750i, '05 C55, '04 R32, '03 M5, '02 GTI, '01 M5, '00 M-Coupe, '00 540i/6, '99 M3 Coupe, '98 M3 Coupe, '96 328i,... '86 4000 CS Quattro... too many to list.
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