good luck...
Second hand headlights are as expensive in this part of the world as new ones. I've even tried to buy them in the UK, Portugal and Australia. Forget it! Cheap, second hand lights for these cars (in the Euro style) are just too expensive and too rare for what they are.
The problem is, we all hate these ridiculous US headlights - not just on 190s, but on all Benzes. I have a 280SL with those ridiculous looking headlights on it. They're ugly and they don't work. As a result, there is a large demand for the Euro style lights for all model Benzes.
My advice, save your money, call up Capitol West <www.capitolwest.com> and they'll sell you a set to suit a 190 for about US$400. Hope that's some help.