I recommend buying FAG wheel bearing. FAG P/N 713 6675 30 or MB P/N 201-980-00-16 for comparison. This is not a job that you want to do often, buy good quality parts and forget it for next 30 years.
Edit: Forgot to add, all W124 besides the wagon use the same rear wheel bearings. The only thing in this kit that will not work with 400E or 500E is the axle shaft hardware that bolts to the diff flanges.
Specific wheel bearing kit for V8 cars with correct screws is NLA if I remember correctly..