The manual tells me that Xenon headlights are adjusted automatically for weight, braking etc. However, I am experiencing a minor issue. Yes the lights are good and bright, dipped in particular is very good. Full beam presents a minor issue, the road immediately in front of the car and along a good bit of the road is fine, the tree branches high up are well lit too, but right where the light should illuminate the end of the road there is a dark band. So to try and explain further, I have two bands of bright light and a poorly lit band in the middle. I have never experienced this before and I take it nothing can be done?