How do you change the Air-fuel ratio with vag-com?

To change the air-fuel ratio using VAG-COM (VCDS), you typically need to access the engine control module (ECM) settings. Navigate to the "Adaptation" section under the engine control module, where you can adjust parameters related to fuel trim or learn values. However, it's essential to note that altering the air-fuel ratio can affect engine performance and emissions, so it's recommended to have a clear understanding of your vehicle's requirements and consult relevant documentation or a professional before making changes.