Hello, I need your help. I have an audi A5 Coupé with about 90 tsd km down. Meanwhile the door panels crack relatively strong when driving over floor waves. The left door covering and door I have insulated with alubutyl. Various parts with felt tape glued on and diolenwatte glued on. There it is relatively quiet. Occasionally it clacks in the upper area near the c column. On the passenger side I have installed many bitumen strips and also dammpaste. Since k It seems as if the plastic rivets, over which the parts of the claddings are held together, become loose and make noises. By the complaint with alubutyl it does not seem to get better. Now I wonder, do I get rid of the cracking by a) riveting with soldering pistons again? B) take more alubutyl c) remove bitumen strips ( d) everything only with felt glue e) felt mattes or diolenwatte glue in f) armaflex glue in order to exert pressure on the covering g) buy new liner coverings at ebay and hope that it will go away. What do you think?