neither have I so I did the next best thing .... fit Philips Extreme 80% brighter bulbs. Ok they probably ain't as good as genuine xenons but since i'm not a fan of aftermarket ones .... Pictures show before and after, they are definatly whiter the pictures in the size below don't show the real life difference. Not bad for £25. One thing I found out, the A3's headlamps arn't designed as well as the MKV Golf. With the Golf you take the cover off and twist the bulb holder and out pops the bulb, no wires to pull off. The A3 is a little more fiddly.