The best bet for you to get service manuals for your car would be to call your local MB dealer or just keep an eye out for some to appear on eBay. I believe that
http://www.books4cars.com also has some MB manuals left in their inventory. Good luck!
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Rgds,
Aaron Greenberg
MB technician
Mercedes-Benz of Cincinnati
'67 250SE Cabriolet
'77 450SL
'80 300SD
'85 380SE
'86 420SEL
'89 420SEL
'93 300E 2.8
'74 Jensen Interceptor Mk.III
'81 DeLorean DMC12
'84 BMW 745i Turbo