S4 suspension tuning

["R. Wiratorn" <withu@loxinfo.co.th>]

        Hi
                My S4 rides on Eibach springs + Koni Sport shock-absorber.
        It is very very stiff and uncomfortable to ride or drive.
                Do you have  experence with Boge Pro-Gas ? Should I
        replace the Koni with Boge Pro-Gas ? The Konis in my car are
        set at the softest position, but still give me a harsh ride.
                the Eibach no, is EW 1527001VA at the front and
        EW 1521002HA at the rear, are these correct no. for my car ?
        I wonder why the same combination provide great comfort and
         handling in my Mercedes W124, but not so in my S4.

                                                                      hope
to hear something
                                                                        K.Ben