Hi fellow audi owners!, i have a b9 a4 with 35000kms, 2.0tfsi automatic, and i noticed when going highway speed (100kmph) i get sort of a humming noise! This only happens when the gas pedal is being pressed, as soon as you are off the pedal the noise stops! This sound is very faint but i notice it and am trying to get to the bottom of this! For any help thank you!