self levelling rear suspension

[Curtis]

Hi Guys

im not sure if im fortunate or not but i have self levelling suspension on the rear of my A8 and when i bought the car the rear was raised and after getting very irritated with ppl bouncying around in the back and bashing my head on the roof on certain bumps on way to work and back. i did some home work and spent many hours fiddling around with the suspension i eventually got the car level and reset the control valve and linkage up according to elsa which seems to have sorted out the bouncy rear
yet i stil have harsh ride compared to the polo i drive aswel.it doesnt bounce but its as if its very stiff and i can feel all the bumps in the road as speeds slower than 60km yet on high way or at speed i cannot feel the bumps. if i push the back down by hand it goes down smoothly and easily. i had someone drive the car while i followed and the car looks smooth on the road at low speeds. it has me baffled. is it just how self levelling suspension is or is something still wrong?