Mercedes-Benz S500 Map Light Bulb Size

The Mercedes-Benz S500 map light requires a single H6W bulb size for the interior lighting system. Data for the specific bulb requirements covers the period from 1998 through 2006.

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

Bulb Size by Year Range

Years	Bulb Size
1998-2006	H6W

Bulb Specifications

Description	Bulb Size
ECE standard (Europe & worldwide). Single-filament signalling bulb with BAX9s base. 12V, 6W.	H6W

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Additional Notes

The Mercedes-Benz S500 uses the H6W bulb size for the map light across the 1998-2006 model years.
The H6W is an ECE-standardized bulb type, meaning it conforms to regulations recognized across Europe and numerous other markets worldwide.
H6W bulbs operate on a 12-volt electrical system, which is standard for passenger vehicles in this class.
The H6W has a rated output of 6 watts, placing it in the low-wattage category typical of interior courtesy and signalling applications.
As a single-filament bulb, the H6W contains one light-producing element, distinguishing it from dual-filament types used in applications requiring two brightness levels.
The H6W uses a BAX9s base, which is an offset pin base design. The pins are not centered, meaning the bulb is keyed to fit in only one rotational orientation within its socket.
The BAX9s base is specific to the H6W and is not interchangeable with the more common BA9s base, despite the physical similarity in overall size.