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      11-23-2012, 03:25 AM   #3
Fanis
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Drives: 116i (F20) Auto
Join Date: Sep 2009
Location: Athens, Greece

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According to my dealer (service department) the car enters ''sleep mode'' (i.e. all power is cut off from al systems) 20' after you lock the car.

Worry not about the iPod, I had it connected for 18 months in the Z4 (and 1 year now in the 116i) and never had a problem with the battery. There is also the battery monitor system in the 1 series (and all modern BMWs for that matter), so if the battery voltage drops below a critical point, even if ignition is ON the system cuts all power off in order to protect the battery and preserve some power for starting the car.
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2011- : BMW 116i (F20)
2009-11: BMW Z4 2.5si (E85)
2007-09: Mini Cooper S (R56)
2005-07: BMW 325ti (E46)
2004-05: BMW 318i (E36)