Hey there. I got Koni Sport on my MB9 with Mad Sportive lowering springs and noticed that the rear left side was sitting higher about 10mm at full soft setting. I put the back shocks at full stiffness to check for anything different and the same side dropped all the way down (no space between tire and wheel arch), so i sent the rear shocks to the local koni garage. Just waiting for a response from them.. Now the deck has front koni and 1/2 turn stiff with the back on stock shocks and mad sportive springs. The ride itself is wonderful, not bouncy and the steering response is fantastic. I do recommend you get yours serviced. BTW gonna try out the Nankang NS-2R 195-50 R15 very soon, i'll leave some feedback sometime soon.