Here are a few things to consider: Alignment is about geometry. Alignment is used to achieve good tire wear and handling. Ride height changes alignment.

On older MB's rear camber was not "adjustable". It had everything to do with ride height. A car that sat too low because of worn parts would have too much camber. The solution was to replace the warn parts - springs, etc.

On the newer cars and older high end models and wagons there is self levelling. If the self levelling is not working correctly, the ride height will be different, and that will change the alignment. Even the new cars have problems. I have seen new S class cars with front level sensors that needed replacement.

One way to check this is to measure from the center of your wheel (on stock wheels use the center of the star) to the underside of the fender lip. Compare side to side measurements, shouldn't be more than 0.5" difference.

Cross camber does matter. In the front some models like as much as 0.5 degrees or more difference to give the car an "on center" feel.

If you aren't satisified with the tech, you can ask the service manager to have the shop foreman look at the car. Some foreman are very good & can identify problems or offer more information than the tech.

RBM was once a highly regarded dealer, I am not sure if that reputation still holds. If you decide to go to another alignment shop, I would shop for an alignment "guy" - NOT their equpment. Much like tire balancing, its more about attitude than equipment. The best alignment shops I use are custom alignment shops that have old style, non-computerized Hunter Lite-A-Line equipment.

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Brian Toscano