What specificly are you looking for? Since you have the 617 engine in your car, you could buy a Haynes manual for the W123 series diesels 4 cyl and 5 cyl engines. It has specs on complete engine tear downs and torque specs for eveything. Even for simple things like transmission pan bolts and drain plugs.

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1999 MB SL500 (110,000 mi)
2004 Volvo V70 2.5T (220,000 mi)
2014 Tesla Model S 85 (136,000 mi)
MBCA member