One dealer I know had a tech who would first use an impact wrench on the lug bolts and then follow with a torque wrench to make sure it was tight enough. He was so stubborn that he wouldn't change his way until the shop forman got involved and explained to him that that was not the correct procedure. The tech always did it his way at all the shops he used to work at!

__________________
1972 450SL
1982 300D Turbo