Ive had my 58 plate 3.0 tdi quattro s-line for about 5 months now and im really not happy with the ride quality. It has been bothering me to the point that i thought something was broken on the rear suspension, but ive had the car in to Audi and they cant find anything wrong. I dont find the ride too firm, quite the opposite if anything Its a bit soft, but the thing that really bothers me is how choppy the ride is. The car never really feels settled unless its on perfectly smooth, new road surfaces (and we dont have many of them in the North east) Would be interested to hear what others think of the s-line suspension, and also opinions on fitting after market springs such as an Eibach pro kit Would this improve the ride quality or just compound the problem? Would be interested to hear from anybody with an opinion on this, especially those who have fitted after market springs. Cheers.