The BMW shop manual I have, shows 27+3 ft lbs for the 12 point driveshaft bolts .
Tighten the pin to 15 ft lbs, then back off and torque to 9 ft lbs .
I don't know the diameter and thread pitch, so I can't look up the standard torque value for the nut .
To convert Nm to Ft lbs, Nm X .737= ft lbs .