just did a quick search and its a massive and very expensive job if you want to do it, I found a thread on audiforum.us where a guy has retrofitted it to his B7, the mod involves fitting the Auto Lights system which means a new windscreen, rear view mirror with sensors, new modules and re-wiring
This is something I've been looking into, It looks quite simple and not to expensive from this guide
or you could just buy a decent torch
..... a new windscreen........
i also have xenons so have no Headlight Range Control Switch, is this going to cause an issue ?