Hope someone can shed some light on a suspension issue I am having with my 2005 Vanden Plas. I can feel a side to side subtle rocking motion on less than smooth pavement. The car had this issue before I replaced the entire suspension, air struts, control arms, sway bar links, steering links. It cleared up a lot of issues like a bouncy ride and banging coming from a bad strut. All in all I am happy with the results but I feel as if I missed something. The rocking motion is still there and I am wondering if its related to the CATS system. Maybe a sensor or air compressor issue. Any input is greatly appreciated.