How do I change the spark plugs on my Audi A3?

I have noticed a decrease in engine performance and want to try changing the spark plugs on my Audi A3. Can anyone provide step-by-step instructions on how to do it?

First, locate the spark plug wires and disconnect them from the old spark plugs. Use a socket wrench to loosen and remove the old spark plugs. Then, gap the new spark plugs to the manufacturer's specifications and carefully install them. Finally, reattach the spark plug wires. It may be helpful to consult your Audi owner's manual for specific instructions.