Can't Backup my Mercedes Nav Disks

In recent years I was always able to backup my Navigation CD’s and now the new version I can’t, even with Clone CD?

These things are like $150 bucks and they don’t hold up well with cold weather, taking in and out etc… Any suggestions?

Check the CD for any form of copy protection, see http://club.cdfreaks.com/showthread.php?t=76916

Possibly reading/writing at a slower speed will bring better results.
You may also want to try using BlindWrite and/or Alcohol120%, and dont use cheap blank media.