There really isn't anything you can do to improve the steering feel, unfortunately. The steering is what it is, dead and non-communicative. A proper rack and pinion steering rack would have improved this car so much. Even MB realizes this when they switch to a rack and pinion rack on the r171 platform the successor to our platform.

Rack and pinion > recirc-ball unit period. This is a sports car, not a large luxury sedan.