USE THE SEARCH FUNCTION!! Covered many times for different holders. Also REALLY helps if you let people know what year and model of A3 you have. Ideally chuck in a picture of your dash too and whereabouts you are wanting to fit it exactly.
Lot of helpful people on here. Just please put a little effort and thought into your posts and SEARCH first!!!!! 60% of the time a search works everytime....
Bit harsh Macros...
Try this JD... http://www.audi-sport.net/vb/a3-s3-sportback-8p-chassis/82418-cup-holder-mod-facelift-a3-s3.html
The other thing is it you could end up with a sticky drink all over your sat nav plus = bad. This happened in my golf and I never did manage to clean it up properly. I wouldn't bother mate.
I've not done it myself. It is a bit of a pain with the only cup holder being under the arm rest so you can use one or the other. Would be better to have one on the dash where you said but I won't be pulling my dash apart to do it. You may be better at that kind of thing. The other thing is it you could end up with a sticky drink all over your sat nav plus = bad. This happened in my golf and I never did manage to clean it up properly. I wouldn't bother mate.