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      01-14-2013, 02:48 PM   #4
cmyk
resident girl.
 
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Drives: 2008 335i
Join Date: Dec 2011
Location: Dallas, Texas

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2008 BMW 335i  [4.38]
It lets RESidual heat from the engine through the vents, keeping the cabin warm while the engine is off. Handy when you're waiting on someone and don't want to keep the car running. IIRC this button was replaced by the ALL control in later models, which sets both sides of the climate control to the same temp.

ETA looks like a couple people beat me to my response Damn slow typing on my phone haha
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2008 E90 335i // Black Everything // photos
COBB tuned / QTP e-cutouts / Helix FMIC / cp-e DCI / AWE BOVs / Black M6 wheels + Toyo Proxes
(and yes, I am a girl)
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