tightening wheel bolts: clockwise?
 

To tighten wheel bolts, I rotate the bolts clockwise, right?

Sorry for stupid question. I just wanted to re-torque the bolts and I did not want to loosen the bolts to find the direction of rotation by trial and error.

Yes, clockwise to tighten, ie "righty tighty, lefty loosey"

Gilly

Two issues:
 

1. To retorque anything properly (including head bolts) you should loosen the bolt or nut by a specified amount (often a half or full turn) and then pull it back up to the proper torque. This includes head bolts. The reason for this is that it takes as much as 20% extra torque beyond the amount it was originally torqued to to get a bolt moving again, after the first tightening motion has stopped.

2. There are a lot of older cars and trucks in the world (especially older Chrysler products) in which the nuts or bolts, or knock-off center spinners, on one side (right?) tighten clockwise, but those on the other side tighten counterclockwise. Fortunately, this is not likely to be a problem on a Mercedes unless you own a classic with Rudge center-lock racing wheels.