Mercedes-Benz S55 AMG Map Light Bulb Size

The Mercedes-Benz S55 AMG map light utilizes a bulb size of H6W for the interior lighting system. Data for the specified vehicle covers the range from 2001 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
2001-2006	H6W

Bulb Specifications

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

Other Locations

Additional Notes

The Mercedes-Benz S55 AMG uses the H6W bulb size for the map light across all model years from 2001-2006.
The H6W is an ECE-standard bulb, meaning it conforms to the Economic Commission for Europe regulatory framework, which governs automotive lighting across Europe and many other markets worldwide.
H6W bulbs operate on a 12-volt electrical system, which is consistent with the standard automotive electrical architecture found in passenger vehicles of this type.
The H6W carries a 6-watt power rating, placing it in the low-wattage category typical of interior courtesy and map lighting applications.
H6W bulbs use a BAX9s base, which is an offset pin bayonet fitting. The offset pin arrangement means the bulb can only be inserted in one orientation, preventing incorrect installation.
The H6W is a single-filament bulb, meaning it produces one fixed level of light output with no high or low beam switching capability, which is appropriate for a static interior map light function.
The BAX9s base of the H6W is not universally interchangeable with other common bayonet bases such as the BA9s, despite a similar physical profile. The offset pin spacing on the BAX9s is distinct and requires a matching socket.