What is the best way to adjust the headlight angle on an Audi A3?

I recently noticed that my Audi A3's headlights are not aligned correctly. They seem to be pointing too low and do not provide good visibility at night. How can I adjust the headlight angle to improve visibility?

To adjust the headlight angle on an Audi A3, start by parking your car on a level surface facing a flat wall. Turn on your headlights and mark the horizontal centre line using tape on the wall. Then, use a Phillips head screwdriver to turn the horizontal and vertical adjustment screws on each headlight until the light beams align with the centre line.