WARNING: This page is about a different car, the 2022 Audi S3, 2022 Audi A3 Quattro, and 2022 Audi A3. However, it is still accessible from the selected car via links, so may be relevant.
-- Carefully pull the engine cover off the ball pins one after the other -arrows-. Do not pull sharply on the engine cover or only pull it to one side (example illustration).