From hella site:
"The versions with xenon dipped beam light are delivered including the automatic headlamp levelling device required for optimum headlamp range and to avoid dazzling oncoming traffic. In addition, a headlamp cleaning system is also mandatory. If your vehicle doesn't already have these features fitted, Hella can provide a retrofit set which is simple to install."
can anyone shed some light on this? what is it? and how much would this cost?