How do you replace the headlight bulb on a 2000 Audi A4?

You need 25cm long Torx 30 srewdriver. There are 4 bolts open top ones (easy to access) and loose ones behing light. Then light moves outand you can access to light bulb. It is not easy to do but when you have done it once then you know what it takes. Be carefull not to break light vertical adjustment motor.