I have looked everywhere for a service/repair manual for my 1993 300e 3.2L, I bought one of those 2 cd sets, worthless, I also bought alldatas online manual, I got my money back from them, it seems like none of them are complete. Most manuals I have had in the past for various cars, usually have a diagnostic area. That is just one of the things the 2 I already purchased didn't have