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      01-04-2013, 11:01 PM   #7
ctuna
Major General
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Drives: 325xi 06 wagon MT
Join Date: Jan 2010
Location: Santa Cruz, Ca

iTrader: (0)

You might want it for more than Nav

Possible reasons are
Rear camera
Net surfing
Song navigation by screen
Internet connection
USB and Ipod
A2dp streaming audio

Better audio in the case of
the base BMW system and maybe Hi Fi