Where is the chassis number on a 2004 a4?

On a 2004 Audi A4, the chassis number (also known as the Vehicle Identification Number or VIN) is typically located on the driver's side dashboard, visible through the windshield. It can also be found on the driver's side door jamb, where the door meets the body when closed. Additionally, the VIN may be present on the vehicle's registration documents and insurance paperwork.