I have a 2007 B180 CDi with Audio-20 system and phone pre-wired (UHI). The Viseeo mb-2 has paired with my 3G iPhone and the contact list is viewable through the dash and Audio-20 displays. However, i cannot make a call using the steering wheel controls or those on the Audio-20. I can make and receive calls using the mobile handset that come through the car speakers, so it is partly working. Anyone have any suggestions?