Hopefully picking my A3 up tomorrow and I really would like bi-xenons if possible. I've done some searching and most people seem to retrofit the OEM bi-xenons at a huge cost and it looks very complicated.
However, I was wondering has anyone done it using none OEM ones (arguably you could get a better set). Something like this? Bi-xenon FX-R Stage III Kit - Complete Retrofit Kits from The Retrofit Source Inc
I was just trying to find out before ordering, because I'm not sure how fussy the A3 will be with its electrics system and throwing up error codes. That said i've seen it done on Seat Leons.