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Old 08-26-2009, 06:59 AM   #49
Registered User
Join Date: Mar 2009
Location: Cincinnati
Posts: 16
My Ride: 04 330ci
The SOS button is part of the BMW assist set up. You are not required to have bluetooth in order for that to work, but you do at least need a TCU and shark fin in order for assist to work. The Bluetooth comes with the newer TCU and lets you have the best of both worlds, but in order for the assist to work when installing the TCU it usually needs dealer programming.
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