Mercedes-Benz S420 Brake Bulb Size

The Mercedes-Benz S420 brake light uses P21/5W and P21/4W bulb sizes for the rear lighting system. Data for the specified vehicle covers the range from 1994 to 1999.

The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.

Brake

YearsBulb Size
1995-1999P21/5W
1994P21/4W

Center High Mount Stop Light

YearsBulb Size
1996-1999H21W

Bulb Specifications

Description Bulb Size
ECE standard (Europe & worldwide). Dual-filament signalling bulb with BAY15d bayonet base. 12V, 21W/5W.P21/5W
ECE standard (Europe & worldwide). Dual-filament signalling bulb with BAZ15d bayonet base. 12V, 21W/4W.P21/4W
ECE standard (Europe & worldwide). Single-filament signalling bulb with BAY9s base. 12V, 21W.H21W

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