hello everyone, i hear a rattling sound whenever i go over 100+kmh and the sound doesnt seem to be affected by accelerating, just by the speed, for example if i go 140 kmh, step out the gas pedal i can still hear it but once i reach around 80/90 kmh it stops rattling, it seems to be coming from the back of my car (maybe rear doors).When its raining outside or the car is recently washed the noise dissapears even when going over 100kmh so only when the car is dry i can hear it.I ve been trying to find a fix for this problem for 5 months but still cant figure it out.I thought someone here had this problem aswell and maybe help me fix this because its really annoying, the car has only 20k kilometres.Do you think it might be due to the aerodynamics of the car? Thanks