The Mercedes-Benz S500 front fog light utilizes H7, H1, or H3 bulb sizes, while rear fog light applications require P21/4W or P21W bulb sizes depending on production specifications. The replacement chart covers 1994 through 2006 model years with corresponding bulb size data for each vehicle generation.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
P21/4W(For vehicle with Special protection, Excluding A 159651 - A 192207 With Phone Handset In Rear Armrest With Phone Handset In Rear Armrest, To ID A 192208)
Bulb Specifications
Description
Bulb Size
ECE standard (Europe & worldwide). Single-filament halogen bulb with PX26d base. Also approved in the US and Japan. 12V, 55W.