I've been using a Motorola E815 for a year with my 2006 X5 which can with the built-in BMW Assist bluetooth module. It works flawlessly, including the volume adjustment via the radio controls on the dash and steering wheel. But I just got a Blackberry 7130 from Cingular and it works equally as well, however, the volume is very low. I can control volume with the radio controls, but it only goes up so far, much lower that what I had with the E815. The volume control on the Blackberry itself doesn't work at all when paired with the car.

Anyone have the same problem?