As far as the sway bars go, you didn't miss a thing. Since there is no difference in the rear bars, you were going to do nothing to your car except to make it understeer MORE.

Stiffening the front bar is a BAD plan, even in the cases where you also stiffen the rear. Most all production cars, MB's included have understeer designed into them. For the average driver, this makes them back off in a corner to keep them from getting into trouble.

Stiffening the rear bar takes away understeer, but stiffening the front bar ADDS understeer. It is quite common to hear people say that they want to, or ARE stiffening the front bar to decrease body sway. THE DEVIL WITH BODY SWAY!!!!!!!! Body sway means nothing when it comes to handling. Good handling involves a car that goes where you steer it.

If you want to improve handling, find a stiffer rear bar and leave the front one alone.

Good luck,
Larry