I've got a 2005 C200K which has the MB pre-wired phone system linked to the Audio 20 and steering wheel controls. I have recently aquired an MB cradle (Ref. B6 787 5835) for my Nokia 6100 phone and carefully followed the instruction to fit the cradle to the connector in centre arm rest and phone into cradle. The phone immediately starts charging and displays the symbol recognising it's in a car system but both the Audio 20 and the dash display "NO PHONE". On the back of the cradle it identifies several compatible phones with an "SW Version" number alongside each. For my Nokia 6100 it says SW Version 5.80. Does anyone know how I get the phone working, do I need to install something on the phone or the car system?? Nokia have take a week to get back to me saying they can't help!!