Yes, the caster and camber are adjusted buy the cams at both ends of the lower control arm.
It is my understanding that a proper gas shock will support 75 lbs. In other words two new front shocks are equivalent to removing a 150 lb person from the hood. I would imagine that to be significant.
The strut type suspension makes the strut a functioning member of front end geometry. All other MB shocks do not. I would align any car that could have had its ride height changed. I would always align a car that had its strut changed. The telescopic strut is responsible for holding camber, the more flex the less camber. Its impossible for the old and new struts to have the same flex and camber changes make huge toe change.
Bosch Master, ASE Master, L1
33 years MB technician