"The lights or reflectors can be adjusted  to
do what? They allow you to focus more light on the road right in front of
you
 or down the road a bit, is that ?

Why are the illegal in the USA?"

The '06 Passat has them. Don't know the range of adjustability, but they can
be focused toward the right so you can see "around corners" a little, or
things slightly out of the primary focus. It's called "Adaptive Front
Lighting System".

bob