The way I look at it, I love the way the cars are engineered, and it was the engineers who determined the various torque specs. I like using the torque wrench because it assures that everything is tightened down as it should be. I use mine on the oil drain plug to avoid cracking the pan. The torque spec. for this bolt on the 617 engines is 30 ft lbs. I definetly use it on the wheel bolts, which have a spec. of 81 ft lbs.

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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