Ok so I am pretty new to the Audi, I have an A4 1.8T the issue is that the warning light for Left Dipped Headlight came on. I just changed the HID low beam and the new light still wont work. Any one have an idea as to what the problem might be.

 

might be a ballast. Try to swap bulbs. If the light still wont light its the ballast or a lose connection. Ohh the ballast if stock if located under the headlight housing.

 

If its not the bulb is probably the ballast. You can swap them left to right see if when swapped you can get the other light to come on. If so that would confirm your issue.

Jason

 

If its not the bulb is probably the ballast. You can swap them left to right see if when swapped you can get the other light to come on. If so that would confirm your issue.

Jason