Martinsvi

Is voice command possible in a c class 2006? I know that alot of the infrastructure is there but we cannot seem to get it to work. The car is a 2006 C55 with Nav and h/k sound. bluetooth and satellite radio as well as cd changer and Ipod i/f. everything seems to light up and be ready but is there a software compatibility in the Most ring where voice command is concerned? I also know that is was a working option on the older 203 chassis, and probably works fine in the 204. Any suggestions??