only if it's able to read dvd's
and i know a lot of car cd players WILL play mp3/wma off of a dvd if they have dvd drives, but some of the earlier ones have a limit to the number of directories/total # of files that can be on the disc, because they have a limited amount of memory to store the (word escapes me) whatever you call the directory on the cd that says which sectors all the files are at....
haha, i can't for the life of me remember what that's called...