For the 1999 Audi A6, low-beam fitment depends on the headlight system. Models with halogen headlights use an H1 low-beam bulb, while models equipped with HID headlights use a D2S bulb. The supplied fitment data does not list a high-beam bulb, so verify the existing high-beam lamp before ordering.
Other lighting fitments include:
- Fog lights: H3 or H3C, depending on the lamp configuration.
- Front turn signals: 2357A or 2827.
- Rear turn signals and reverse lights: 7506.
- Brake, tail, and rear side-marker lights: 7528.
- Center stop light: 2723.
- License plate and step lights: 6418.
- Parking and front side-marker lights: 2357A.
Check whether the vehicle has halogen or HID headlights, and compare the installed bulb or socket when more than one fitment is listed.