Hello, I have a 2004 Audi A8 and it seems to have a bulb out. I was looking at replacing all of them. So far I replaced the fog light with an OPT7 H11 LED Fog light Replacement bulb and I am very happy with the brightness and quality of light. I was considering going with OPT7 for my main headlights as well but was wondering which products to actually purchase. If someone could tell me which OPT7 product to use for each Audi Bulb that would be extremely helpful! Thank You!