Eric, I'm very surprised that you have had no replies.

Sorry that I cannot help. I have a similar enquiry but would like to know specifically if anyone has found the Bang & Olufsen Serene/Samsung E910 compatible with the BMW Bluetooth system?

I too have a 2006 model X5 (built very late 2005), but I am in the UK and my service provider is Vodafone.

Anyone???