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Ok, This is an old thread but the new HPA GenIV is on its way to the USA. Heard it from the horses mouth. I have the new Audi Gen IV in my A3. The setup is different then the previous versions so I doubt it will fit prefacelift A3
Do you use the Eco function for long distance/ highway driving? Do you notice a difference in mileage? if so ho much and is there any different feel in the car?