S Button open the valve, does that means you have less back pressure? and...
08-02-2006, 04:33 PM
#2
S-button opens the exhaust diverter valve and remaps the throttle response
I've never noticed any change in low end performance. It does seem to slightly increase gas mileage at highway cruising speeds, as the engine seems to breathe a bit better, from my experience.
08-02-2006, 04:41 PM
#3
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Audi should have also given us a R button.....
for rice, it opens up a hole in the exhaust so the car sounds like a coffee can exhaust and it limits the engine to 150 HP. This way the car would not go very fast but make alot of noise.
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