The latest software with auto pair puts the sound on the car speakers regardless if you push the steering wheel button or the phone button. I use an iphone, and there is an easy option to "switch audio source" which lets you choose between BMW, Handset, and speakerphone. Its a lot easier than turning the bluetooth off.

What I hate about the bluetooth is that if your car is on and you are in the store or at the car wash lounge and are talking on the phone, and you come within the 30 feet of the car it automatically puts your call into your BMW through BT. First few times I thought it got disconnected but my car wash guy said "your car was talking and yelling".

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2011 ///X5 M (On Order)

2009 X5 4.8 M Sport Space Gray/Black Fully Loaded

2007 GMC Yukon XL Denali Loaded and Customised