Your replacement spring specification depends on the options fitted to your car. Auto box is heavier so stronger springs may be needed. Air con, sunroof, larger engine, even a radio can add points to the equation used for specifying the spring rating. MB knows these things best but so do Sachs, Bilstein, H&R. Eibach and, doubtless, others.
As long as you get this right, all should be well.
To answer your original question, yes, Sachs is good stuff.
RayH