Dom camp or coupling bar ??

Salü alle zusammen ! Have a Coupe type 89 Bj 93 with 2.8 liter machine a little problem with my summer car and I just can not get behind it. I bought the car with 54000 km – at that time the noises from the front axle were still much lower than today – now I have about 90 000 km on it and it has become much louder—- I describe the sound to you:It sounds dull , occurs especially when I drive over cobblestones or with every batter- it is no hard knocking (trag joints and silent bushings are fine) it sounds like a dull-speaked dub. Are these the cathedral bearings, the coupling rod or any rubber bearing – do you have a sketch? Thank you already in advance Reini