In case you happen to use a torque wrench:

M10 bolts 41ftlbs (55nm)
M12 bolts 48ftlbs (65nm)

Here is the link to which I found torque specs:

http://www.peachparts.com/shopforum/showthread.php?t=143289

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1982 MBZ 300SD Turbo Diesel- just turned 200,000- just breaking her in