How do I properly adjust the air/fuel mixture on my Audi A4?

I need to adjust the air/fuel mixture on my Audi A4 but I'm not sure how to do it correctly. Can anyone provide step-by-step instructions for this process? I want to make sure I do it properly to avoid any potential engine damage.

To properly adjust the air/fuel mixture on your Audi A4, you will need to locate the mixture screw on the carburetor or fuel injection system. Turn the screw clockwise to make the mixture richer and counterclockwise to make it leaner. It may take a few attempts to get it just right, so be patient and make small adjustments at a time.

First, make sure your engine is fully warmed up. Then, you need to use a screwdriver to turn the mixture screw until the engine starts to stumble or die. Next, turn the screw in the opposite direction just enough to bring the engine back to the highest possible idle speed. Finally, make slight adjustments as needed to reach the optimal air/fuel mixture.