Originally Posted by raysorenson

I didn't know you couldn't do a live caster adjustment on a Merc, but then I never do it on any vehicle. I always do a caster sweep after a caster adjustment because I do not trust the machine to accurately infer caster for live adjustments. I say infer because it can't "see" caster like it does toe and camber. It measures the change in camber when you turn the wheels left and right to infer caster. Measuring caster during a live adjustment adds another dimension to be measured and I've verified that it's only a ballpark value.

As the alignment machines get easier to use, the knowledge required of the tech to get by can be reduced. Since it's not the machine that aligns your car, don't judge a shop by it's equipment. You can do badass alignments with less than $400 in equipment.