The xenons have self leveling sensors fitted to them (rear of the car) in the factory, so, unless the self leveling function is not working, they will be at the right height, based on the weight in the vehicle
Just double check this function is working next time you start the car, before you start it, turn the lights on (that way you can see it inside the vehicle), then start it, they should go down and then up, at that point there at the pre-set height
Yeah, they seem really bright, and I know I cop alot of people flashing lights at me too, then can be adjusted down by the dealer, but they will be lower than intended........but, I'm currently looking at this to stop the issues from other drivers, as I usually get flashed at least twice (sometimes alot more) when driving at night......it's the only thing for me that shine off the fantastic GTI experience, but in saying that, I'd still get the xenon's every time!
DC