The Mercedes-Benz S350 front fog light uses H7, H1, or H3 bulb sizes, while rear fog light applications require P21/4W or P21W bulb sizes depending on model generation. The replacement chart covers 1994 through 2013 production years with corresponding bulb size specifications for each vehicle generation.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.