Where is the rear wiper relay located on an 2002 Audi a4?

The rear wiper relay on a 2002 Audi A4 is typically located in the relay panel, which is found beneath the dashboard on the driver's side. To access it, you may need to remove the lower dash cover. The specific relay for the rear wiper can be identified in the relay panel diagram, which is usually found on the cover or in the owner's manual.