Mercedes-Benz 190D Dome Light Bulb Size

The Mercedes-Benz 190D dome light requires a 6411 bulb size for proper illumination within the interior cabin area. Data for the specific component covers the period from 1984 through 1989.

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
1984-1989	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 190D uses the 6411 bulb for its dome light across the 1984-1989 model years.
The 6411 is classified as a festoon bulb, meaning it is cylindrical in shape and mounts by pressing its end caps into spring-loaded contacts rather than using a screw or bayonet base.
The 6411 bulb has a length of 36mm, which is a critical fitment factor, as festoon bulbs must match the contact spacing of the housing to seat correctly.
The 6411 uses an SV8.5 base designation, which refers to the diameter of the end caps in millimeters and must correspond to the contact size in the fixture.
The bulb operates at 12 volts and 5 watts, consistent with standard low-draw interior lighting in 12-volt automotive electrical systems.
The 6411 designation follows ANSI standards as applied in the United States and Canada, meaning the specification reflects North American market nomenclature.
Festoon bulbs of the same length are not always interchangeable, as differences in base type or wattage can affect fitment and circuit compatibility even when physical length is identical.