1 piece 3rd brake light, rear, compatible with A6 C5 S6, and compatible with AVANT 1998 1999 4B9945097A. mount third brake light. Benefits and features Quick activation with a clear visor that emits bright, glare light for improved visibility. Functions as a brake light, providing a brighter and more visible light and a brake warning to help you stop safely. Enhances safety by increasing visibility to drivers coming from the opposite direction. Clear, contrast red illumination designed to be a reliable replacement for the specified models. Notes Please keep the two screws; they are not included with the light. Using an incandescent bulb instead of an incandescent bulb gives your truck a more modern look; it's usually waterproof. Apply a small amount of silicone or clear RTV sealant on to prevent leakage. Installation Easy to install; ready to use; no special tools required, saving time and effort. The exterior features a intensity red brake light that illuminates the entire trunk, making it an ideal replacement for certain models.