auto head lights

A few weeks ago I noticed, when driving my R171 300 V6 at night that the main lights had suddenly become dimmer. I always have the lights set to auto and they stay on after locking and leaving the car (called "Welcome Home" light setting?). When looking at the lights they are still bright, as...

Good evening all new here just bought a CLK 220CDI Old 57 plate having issues with auto headlights inoperative although they always are on when I set to auto thanks to dark miserable days so they seem to active anyway I have tried a second hand unit which was advised as tested/working I have...