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      04-12-2011, 09:08 AM   #10
sfax
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Drives: BMW X3 2011 F25
Join Date: Nov 2010
Location: Berkshire, UK

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Quote:
Originally Posted by bekind View Post
I'd also like to know about the battery drain in general. Say we leave an interior map light on, will the vehicle know when the battery is being depleated and kill any electrical activity to allow enough juice to start the car?

On our Tahoe there is something called RAP. Retained Accessory Power. Basically it will allow things like the radio or map lights to work until the truck feels there is a low battery event. It will then kill all accessories to permit a start of the vehicle.

We have anything like that on our X3s?
It automatically kills the power when you've got the engine off but the ignition is still on and you're using the iDrive or something - can be a little annoying actually. You have to press stop-start to switch it back on again. I'm not sure if this functionality extends to interior lights
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