I think what you are describing is different. What I was posting about is constant roughness/subtle vibration you always feel on the seat no matter what the pavement is like. Mainly between 30-50 mph because I am guessing going faster the suspension has no time to react and mess things up. It stinks in city driving.
Only way I can explain it is that the X suspension is just not refined to handle normal/tiny road imperfections because it has not been developed enough. In comparison to Mercedes and BMW air suspensions is at least a couple of decades behind and you do feel it coming from or also having a German car. It is night and day refinement wise. I started this thread because I was totally surprised by it and hadn't seen any discussions specific to refinement and to see if there are any solutions.
Have been on vacation and won't been able to look into what else I can do for a couple more weeks but if there is no solution the MXP will most likely be gone soon. If that happens I will definitely miss the drive train though, and other things software related. I love the no button get in and go, or the stop, remove seat belt and leave the car! Or the cabin overheat protection, GPS based suspension raising etc. etc. I have a rental while on vacation and I keep forgetting that I need to press a button to stop the engine! Also, our local service center is great - much better that local German car dealerships.
But cannot keep driving a car that makes me tired/tingly/numb commuting and running errands everyday.