Primera P11 – Quiet, undefined polishing

Hello everybody, I have a Nissan Primera P11 1.8 limousine from 1999. The car now has 130tkm on the clock and I am very happy. What annoys me every now and then is an annoying, undefined quiet poltern. I have tried to locate the poltern several times, but so far without success. I have the impression it comes from the front right, then again from the back … that makes the troubleshooting of course extremely difficult. It is also not so that it louder on uneven roads. I can drive on the worst field and don’t hear anything. Then comes the smallest floor shaft and it gets worse. Regardless of the speed. Now I wanted to ask if you might have a tip? I already checked the following: – Spring breakage – Oily shock absorbers – Exhaust clamps. Yesterday I greased the rubbers of the stabilizer rod. In addition, I sprayed every joint and bearing properly with WD40. change. It can of course be anything and nothing, but before I change shock absorbers, crossbars, coupling rods or dome bearings I would be happy if any of you have a hint or tip. Thank you, Grüße Team M3