How do you replace Audi a3 rear bulbs?

To replace the rear bulbs on an Audi A3, first, open the trunk and locate the access panel on the rear light assembly. Remove the panel by unscrewing or unclipping it, then disconnect the wiring harness from the light assembly. Twist the bulb holder counterclockwise to remove it, replace the old bulb with a new one, and reassemble the light assembly by reversing the steps. Always ensure the new bulb is securely fitted and test it before closing everything up.