Mercedes-Benz 300SE Dome Light Bulb Size

The Mercedes-Benz 300SE dome light utilizes a 6411 bulb size for interior illumination. Data for the specific lighting component covers the period from 1988 through 1993.

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
1988-1993	6411

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Festoon bulb, 36mm length, SV8.5 base. 12V, 5W.	6411

Other Locations

Additional Notes

The Mercedes-Benz 300SE uses the 6411 bulb for the dome light across all listed model years, spanning 1988-1993.
The 6411 is classified as a festoon bulb, meaning it is cylindrical in shape and mounts by pressing its end caps into spring clips rather than using a screw or bayonet base.
The 6411 bulb follows the ANSI standard, indicating it meets the standardized specifications recognized in both the United States and Canada.
The SV8.5 base designation refers to the festoon cap size, with 8.5mm representing the cap width, which must match the spring clip spacing in the dome light housing.
The bulb operates at 12 volts and 5 watts, consistent with standard low-draw interior lighting in automotive applications of that era.
The 36mm length is a critical fitment factor, as festoon bulbs are sized primarily by their overall length, and an incorrect length will not seat properly in the retaining clips.
Because the 6411 is an ANSI-designated bulb, it is interchangeable with other bulbs sharing the same ANSI number, provided they match the 36mm length, SV8.5 base, 12V rating, and 5W output.