Just bought a s/h Viseeo mbu-1000 to go in the MB Actros truck which has an MB fitted hands free phone to take a Nokia 6310. I don't know if its an incompatibility problem, or whether I've bought a dud, but the system does not recognise anything inserted into the cradle when the viseeo is present. No power seems to be present in the viseeo either. I've connected it to the computer via the mini usb cable, but still no recognition of its presence there. The truck system is working fine with the bona fida Nokia 6310 phone. I don't know anyone with a MB kit fitted to a car to try it in, so is there anything I can do to test if it is a dud before I throw it back at the vendor. Yours.