Hi everyone. I'm new to Xenon headlights and have been reading the posts to get an understanding. I have a problem with my N/S headlight (1999 C200 W202). I changed the bulb but it didn't cure the prob. I now realise it's either an Ingiter or Ballast problem but I don't know how to tell. I'm puzzeled because the main beam works, but not the dipped beam. Does this indicate a problem with the Igniter or Ballast? Any help greatly appreciated.