There is an error in that manual. In the etron if you see a pedestrian just accelerate hard, they will hear your engine start up and move out of the way

Just kidding with you the etron is a nice motor

 

No noise in the UK model.

 

"whooosh!!" Is the only noise I hear pull away from the lights

The e-tron concept made a cool sound in the videos, but this was more of a futuristic electric sound. What noise does the A3 make?

 

Schboing! That's the only noise, and only when a pedestrian decides to cross without looking when you're right behind them.
(Although I understand sometimes it's followed by Aaargh!)

 

Pedestrians do that all the time - especially when in supermarket car parks - you're 1/2 way reversing out of a bay and someone decides to push trolley and/or pram and kids behind you on the grounds that you are the one who will have to stop - presuming you've seen them of course as they move through your various blind spots while you try to check on 3 or 4 different views on either side and front/back they thust their spawn into harms way.

Let alone those on the pavements with their head deep in facecrap or their ears full of yoof-mzik or whatever they call it these days.