I have some CD Nav parts available for retrofit.i have a 99 ml430 and i am wondering where i might be able to get/buy a used navigation system
Probably on your 1999 you do not have MCS or COMAND, so the upgrade gets pricy.
I have a 2002 ML500 and have upgraded from the CD Nav to DVD. You will need to add the GPS Antenna and cables, but Clairparts has a kit.
Let me know if you are interested and we can discuss.