Problem with 528i headlights

There seems to be alot of problems with headlights on these types o cars my uncle has a 2001 528i and his headlights when he bought it were out of line and dirty so if someone can please explain.

Although I did have problems with my 528 light, they would not go off once, even after removing the key! Being out of line is easy to adjust yourself. Dirty? What behind the glass? That could be a water leak.