I have fitted about 5 sets of Xenons for forum members that includes the auto leveling and in 3 of the cases the washers...I have also done my own on retro fit they have all worked perfectly with out any problems.
The actual fitting is a doddle no special tools and I have got the fitting down to about 2 hours all in with a factory look you cannot tell it wasn't fitted from VW,
If you need any info or advice let me know and ill could talk you through a retro fit of the levelers and bendy lights? I think the auto level kit from Kufatec with all the sensors and controllers is just short of £400. if you can get the headlights with the ignitors and ballasts cheap enough then your laughing, you don't really nead the washers if you keep them clean enough, But I think the levelers do a good job of keeping the light at a good level to see whats in front all the time.
Darren