Any good advice on the easiest way to replace the bulb in a front fog light in a A4 B6?

 

Take off the grill, and the lamp is screwed in. Pull it out and swap bulbs. In a USP at least.

 

I believe the non-USP should be pretty much the same steps. Just take a few extra minutes and make sure you give the grill a good tug to get it out but dont force it.

Notice that there are adjusting screws and screws that hold the fog light assembly into place. (Make sure you undo the correct ones)

Unclip the harness from the back of the light assembly and remove the bulb.