mbfan_60

Hi. I just bought from ebay.de navigation cd-s (version 4.1) for my aps 50 (i own an e270). Yesterday, my daughter found them in the dash and, of course, now the first CD is scratched and it doesn't work as before (it makes a lot of noise and starts very slowly, the loading takes a few minutes). What i would like to ask you is if you could tell me how to make a backup of my other cd-s? Should I use nero? Thanks a lot