For the Motorola Vxxx, you have to perform it on the phone. Select Settings, Connection, Bluetooth Link, Handsfree and then drop the active connection.

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2011 550xi Carbon Black/Oyster, M-Sport, Premium Package, Technology Package, Electronic Damper Control, Dynamic Drive, Comfort Access, Active Seats, Surround Cameras

2013 X5 5.0 Space Grey/Black, M-Sport, Premium Package, Technology Package, Comfort Access, Surround Cameras