Vanity Mirror Illumination Bulb -L31-, Removing And Installing: Notes
WARNING: This page does not describe the selected car, but rather 19 other vehicles, including the 2017 Audi S5, 2017 Audi A5 Quattro, 2016 Audi S5, 2016 Audi A5 Quattro, and 2015 Audi S5. However, it is still accessible from the selected car via links, so may be relevant.
The vanity mirror lamps may be LEDs. LEDs cannot replaced, so the vanity mirror lighting must be replaced completely.