I have a 2012 C300 and purchased a used radio unit (old one broke). I got the following error message displaying on the navi screen.
"Map data does not match COMAND. Please insert the map data DVD with the correct map material."

Since this is a used radiom, my question is can I purchased the SD disk from the Mercedes dealer and for $250 and install it?

I understand that these SD disks can only be used once, and would hate to spend the money if there is another way around this.

Any feedback is greatly appreciated!