OK, couldn't figure out that from your first post. This certainly is not on the car manual or Comand manual but it should still read on the disc you got. Where did you get the disc?I was talking about the head unit firmware upgrade to show ETA and telephone stregth bar on bottom of nav map screen
The principal thrust this string dealt with navigation updates for DVD-based nav systems. Your CD-based nav system does not update firmware the way DVD-based systems do. You do not need to access the engineering menu - you just use the latest nav CD set.
Navigation and COMAND updates are done by the dealer. I do not know the current firmware edition for your car, but it does not change often.
Your COMAND will display a limited number of CD titles, if you name them and store the names. It will not display song titles - only track number. Your COMAND manual covers this. I am not aware of a way to upgrade the unit to alter that.
I successfully replaced a NAV 4.1 DVD with NAV 10.0 in a 2004 W220 NTG1. The new version 10.0 installed straight away.If you skip several map update discs, you may reach a point where your system will not recognize the newest map DVD as it attempts to update nav software.