The last manuals I got for Mercedes were for my 89 SL and SEC.
I did manage to get a "intro to service" for my 92 SEL. Steve is right, Mercedes makes you sbscribe to to the web site, because they were mandated by the government to do so. If this were not the case they still would not put anything out. The techs at the dealership got some books when they went to school, but now the dealerships have to subscribe also. I have always obtained SHOP manuals for my american cars.
Dont get your shorts all knotted up, Steve gave the correct answer, if you dont like it discuss it with Mercedes. There are also other forums, if you dont like the answers or the way they are worded!