For the 2015 Audi RS 5, the low-beam and high-beam headlights both use D3S bulbs. The supplied fitment data does not identify separate projector or non-projector headlight variations, so verify the marking on the installed bulb before ordering.
Other exterior lighting includes a 64132 bulb for the front turn signal and a 921 bulb for the reverse light. The cornering light is listed as H7 LED, which is separate from the D3S headlight applications.
Interior and convenience-lighting applications include a 6411 dome-light bulb, 2825 bulbs for the glove box, map, interior, and trunk lights, and a 6418 vanity-light bulb. Match each replacement to its specific location, especially when replacing the cornering light or any interior lamp.