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      03-01-2013, 04:16 PM   #2
theunderlord
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Drives: 2010 E60 M5 6MT
Join Date: Feb 2013
Location: Seattle

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1. radio readiness means that the key would be in position two, engine off, accessory on. (or in the cars with the engine start button, just press it once quickly)
2. the point, (I believe) is to use excess engine heat to warm the passenger compartment with the engine off. Like if you went to the grocery store, and it was cold outside, the interior of the car would be still warm when you were done shopping.