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      01-06-2011, 10:22 PM   #2
MysticBlue
Major
 
Drives: '09 M3 DCT Coupe
Join Date: Apr 2008
Location: Eastern Oregon... They call 'em rigs here

Posts: 1,210
iTrader: (0)

It has variably controlled compressor and in effect is "disengaged" when needed, so no need to turn it off. The compressor only operates when needed. Mine is always on, even on the track.
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