naughtynels

I seem to keep blowing headlamps for some reason on my CLK500. This happens about every 3 months. However this time when I went to change it, it no longer works at all. All the other lights as good but the drivers side driving light. When to check the fuse and either I have missed it 3 times or I can't seem to find a fuse for the headlights. I have looked in all 3 fuse boxes and nothing for the headlights. Can someone please just point out how useless I am and lead me in the right direction to fix this issue. Thanks