Mercedes-Benz 280SL Dome Light Bulb Size

The Mercedes-Benz 280SL uses a 6411 bulb size for the dome light. The replacement chart covers 1968 to 1971 production years with corresponding bulb specifications.

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
1968-1971	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 280SL uses the 6411 bulb for its dome light across the 1968-1971 model years.
The 6411 is an ANSI-standard bulb recognized in both the United States and Canada, operating at 12 volts and 5 watts.
The 6411 is a festoon-type bulb, meaning it is cylindrical in shape and mounts by pressing its two end caps into spring clips rather than using a twist or plug-in socket.
The bulb measures 36mm in length, which is a critical fitment factor, as festoon bulbs of differing lengths are not interchangeable even when voltage and wattage ratings match.
The 6411 uses an SV8.5 base, a designation that refers to the 8.5mm width of the metal end caps on a single-contact festoon bulb.
A festoon bulb with the correct 36mm length but a different base width, such as SV7 or SV10, would not seat properly in the 280SL dome light housing.