It's a case of looking at only the first few posts and then the last post. I thought what was being discussed was the service CD-ROMS MB sells. I have no knowledge of these epc CD's, although I have used the epc system a little at the dealership. Remember when this used to be called "EPIC"?
ps Since I got confused on it, I think it's important to point out that these EPC discs are parts catalog discs, they won't help you diagnose or repair anything.