Roads? We Dont Need Roads!!!!
Mine does this but only when I have the ECON on... on the climate control. If the aircon is on I don't get the sound increase when I go faster. Dont know if that helps any but you may want to check that the ECON LED (light) is working... especially if your getting the rushing sound but there is no ECON LED on.
Car: A3 1.8T
Mods: Revo Stage 2, Milltek, K&N, Forge 007p, B8's & Eibach Springs, 312MM OEM Brakes, BBS LM's, Light Pack, Ally TT Pedals, New Audi Gear Knob, Int LED's
Wish List: ARB's, FMIC, Hose's, Maybe A Clean Engine Bay and Free Petrol