Most likely, you do not have Bluetooth. BT was not available until the 2005 model year telematics contul unit modules.

If you have SOS, most likely you have a TCU and microphone. If you want to know for sure, just pop open the little sunroof panel and visually look for a mic behind the mic grill. Likewise, open the trunk and look for the TCU-- it should be located on the brackets above the CD changer. You probably have an earlier TCU without Bluetooth.

If you want to add BT, you just need to update to a newer TCU module and install the BT antenna and cable. Scroll down... there is an entire BT forum dedicated to this upgrade.

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2000 E38 750iL Highline Edition, Upgraded with the lastest 2006 X5 Electronics
MKIV Navigation, 16:9 Display, Bluetooth, TV/Video with Backup Camera, Sirius, and Aux Input