Mercedes-Benz 280SE Dome Light Bulb Size

The Mercedes-Benz 280SE dome light requires a 6411 bulb size for proper installation and function within the interior lighting system. Available data covers the span from 1968 through 1980 for the specified vehicle components.

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
1977-1980	6411
1968-1973	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 280SE uses the 6411 bulb for the dome light across all model years listed in the specifications, spanning 1968-1973 and 1977-1980.
The 6411 is a festoon-type bulb, meaning it is cylindrical in form and mounts by pressing between two spring clips at each end rather than inserting into a socket.
The 6411 bulb follows the ANSI standard, which applies to the United States and Canada, establishing uniform electrical and physical tolerances for the type.
The bulb operates at 12 volts and draws 5 watts, placing it in the low-wattage range typical of interior courtesy lighting.
The SV8.5 base designation refers to the metal end caps of the festoon bulb, with 8.5mm indicating the cap width, a detail relevant when substituting equivalent festoon bulbs.
The 6411 bulb has a 36mm length, which is a critical fitment factor, as festoon bulbs must match the exact span between the fixture's contact clips to seat correctly.
Because festoon bulbs are sized by length and cap width, a 6411 replacement must match both the 36mm length and the SV8.5 base to function properly in the 280SE dome light housing.