How can I troubleshoot my Audi A4's engine misfire?

My Audi A4's engine seems to be misfiring, causing a rough idle and decreased performance. What steps should I take to diagnose and fix this issue?

First, check for any error codes using a diagnostic scanner. This will give you a starting point for troubleshooting the issue. If no codes are present, the issue may be more difficult to diagnose and may require the help of a mechanic.

Check the spark plugs and wires for wear and tear. These are common culprit for engine misfires. If they are worn or damaged, replacing them should improve performance.

Another potential cause for engine misfires is a clogged fuel filter. It's a good idea to replace the fuel filter every 30,000 miles as part of regular maintenance.