From the cd manual:
Complaint: Vehicle heads to the right on flat surfaces
Model 124 except 4matic
Influences of tolerances in components of front axle and body. Perform the following wheel alignment adjustments on the front axle (ready-to-drive)
Wheels in straight ahead position
(Toe in value 0) Left = 10, right = 11
With wheels turned Left 9 40, right 10 40
Camber and toe-in (unchanged) specified value
The numbers are in degrees and seconds. I didn't know how to use superscript fonts.
Good luck, I know how annoying aligment problems are.