The SOS system is a cell phone essentialy
Check the Vin for the bluetooth option you should have
all the hardware you need. I don't see how they would equip a
car with SOS and not have bluetooth phone enabled to.
There is a list of option codes in the coding sub forum sticky.
http://www.e90post.com/forums/showthread.php?t=717103
mine came with premium package I think its included in that package.