RS5 B8.5: Did anyone else notice the humming/fan sound seeming to come out of the engine/exhaust (difficult to pinpoint) when going between 115 and 125 km/h (70 and 80 mph). It seems to peak at around 74-75 mph, which is annoying since it happens to be at or just over the speed limit here.
I wonder if this is some kind of reverberation, will try to switch off change the fan setting (I know this can make quite a bit of a noise).
If it is not a flaw, but by design, it would interesting to know what the purpose for it is.