Hi all again,

Names Kevin. Just aquired a 1 yr old A6 (2002 model). I notice sometimes that when I switch my headlight on, my left headlight flickers then no light, but when I switch it off and on again, It's ok. Could it be the bulb?

Thank you.

Xenons or Halogen???

Either case, I would check the bulb wiring / relays.  If it is Xenons, check for water or moisture in or around the ballasts.  Also, look for the connections on the bulb...  Perhaps, the bulb might be bad..?