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      04-02-2013, 06:13 AM   #3

Drives: 2008 E92 M3
Join Date: Dec 2011
Location: Hawaii

Posts: 474
iTrader: (1)

The REST button will blow warm air into the cabin after the car has risen to normal operating temps, the ambient temp is 59 degress (F) and can ONLY be initiated when the ignition is in position 1 or OFF.

You can use it to keep the car warm when you are running errands or stopped in traffic can turn the engine off and keep the interior of the car warm for up to 30 minutes OR until you turn the ignition back on.