The 2015 Audi S6 uses LED lighting for both the low-beam and high-beam headlights. These headlight positions are listed as LED rather than replaceable halogen bulb sizes, so confirm the vehicle’s original lamp assembly before ordering a replacement.
Fog-light fitment has multiple entries: H11 LED, H16 LED, and 64136. Check the existing fog-light bulb and socket carefully, as the correct option depends on the installed setup. The front turn signals, brake lights, center stop light, cornering lights, daytime running lights, parking lights, side markers, tail lights, rear turn signals, and license-plate light are all listed as LED.
For other replaceable positions, the reverse light uses 921. Interior fitment includes 6411 or 6428 for the dome light, 2825 or 98 for the glove-box, interior, and trunk lights, 6486X for the map light, and 6418 for the vanity light. Verify the old bulb where multiple options are listed.