The Factory Service Manual is $19.99+$7 shipping. Go to the site below and when the page opens look for "Search by Literature Type" and pick "Service Manual" and what the offer will come up to the right.
Part #- QL-6516-5610-02 CD-Rom 123 Service Manual ...
http://www.classictechlit.mbusa.com/MB/Default.asp?cookie%5Ftest=1