If you look at MB wheels you will notice holes around the perimiter of the lug nuts, that is where MB locates the laser tool, not on the rim lip. MB also centers the steering wheel with a fixture and work foreward from that. The tech at MB Palm Beach spent almost one half hour freeing up the the tie rod sleeve, I doubt any of the quickee shops would take the time. I was charged $134 for a four whell alignment out the door, and gave me a evaluation of the suspension.
I would rather pay extra from someone who works only on MBs, they also balance tires using a Hunter road force balancer.