One problem related to headlights has been reported for the 2001 Mercedes Benz E430. The most recently reported issues are listed below.
The zenon headlights are blinding also for the driver of the car equipped with them. The reflection on objects and signs is annoying , blinding and a nuisance. They also tire the eyes much more. I am 52. I know you have a study on this and wanted to contribute this, as a driver and of course also as ad driver facing cars equipped with them. They should be banned.