I mentioned, in an earlier post, the availabilty of technical manuals for a very reasonable price from MBUSA. I got the service manual cds for my 1987 300SDL from them, and it cost $19.99 plus shipping, as opposed to the $120 I forked over to PerformanceProducts for the cds I got for the 1987 300DT.
I just received an email requesting help in locating these manuals on MBs site, and it is somewhat convoluted, so I am posting the information here, as well as a direct response to the individual who queried me. To find the manuals for your car:
Go to MBUSA website:
http://www.mbusa.com/index.do
move your cursor over the "Mercedes in Depth" pop-up
from the pop-up menu select "Classic"
on the new window that pops up, place your cursor over the "Classic Center" tab
from the pop-up menu select "Technical Literature"
in the new window that pops up, select the "Service Manual" item in the list for "Search by Literature Type", or select your specific model information in the "Search by Vehicle" section.
Don't forget to scroll through the window(s) that pop up for your searches...
In addition to the Service Manuals, many members may find the Owners Manuals and Illustrated Parts Manuals useful...
I hope this is useful (maybe put in a sticky?)