with a correct adjusted box on a w124 the steering feel is very different than any other car and is a real pleasure to drive.
The alignment specs for your car are a bit different due to height differences and drag link angle difference. You also might want to ask your mechanic of the ball point position - its the plane of the pitman and idler arm being the same. A new box can change it if the pitman arm is not at the old location on the sector shaft.
http://www.w124-zone.com/downloads/MB%20CD/W124/w124CD2/Program/Chassis/40-0001.pdf
This page tells you the specs, please bear in mind these are in whole degrees not decimal degrees. meaning 0°30' = 0.5°
the wheel bearings may become gray or brown after a few years in use, if they are not heat colored and roll smooth then a repack with fresh grease is all that is required. They are very low cost items too. You can choose to fill the alien green MB wheel bearing grease or buy a generic disc brake WB grease pot.