I just did this job about three weeks ago. The bolt is normal thread (righty tighty, lefty loosey) but has a very high torque spec. You will most likely need the crankshaft locking tool that engages the starter ring gear to prevent the crankshaft from turning when removing/retorqueing this bolt. Once the crank is locked, a three foot cheater bar makes the job very easy..............

Also, be sure to position the crank at 0 TDC prior to removing the balancer/pulley. That way the woodruff key will be at the 12 oclock position. BE VERY CAREFUL when you reinstall the balancer/pulley. It is very easy to push the woodruff key into the the lower timing chain cover if things aren't lined up properly. (ask me how I know........fortunately, the car gods were with me, magnetic fishing retrieved the key from the depths on the first cast)

J. M. van Swaay

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1994 E320 Wagon, 230,000 miles
1995 E320 Sedan, 106,000 miles
1994 E500 Sedan, 79,000 miles