I have a 2002 CLK320 with COMAND 2.0, Navigation, and only the single CD. I can't get the CD Naming function to work. I can select the function and enter the CD name, but there's no "->" icon to select. It's simply not there. That icon is there when you enter text in the Nav screens, but not the CD function. The manual says it should be there. I also verified that the name list is empty. Any suggestions?