So got me this terrible sounding creaking noise in my rear axle suspension, tried to isolate it with stethoscope but noise is everywhere in every moving part, seems worst in upper front control arm and ball joint car has only 95Kkms (60Kmiles) and 11 yrs old, checked for play in ball joints and every suspension joint all seems tight and good.
Finally remembered having same noise in my E39 and the ballpoint is the same part on both models, so I made a tiny cut with my smallest slot screw driver in the rubber of the ball halfway up,from the bottom and used 3 in 1 lubricant can with red straw and filled with grease from the can guess what no more creaking and car is again quiet as a mouse, did order new ballpoints for they are on way out obviously but I can replace them at my leisure when I feel like it now. Or maybe wait till they are no,longer tight........