Mercedes-Benz 230 Dome Light Bulb Size

The Mercedes-Benz 230 dome light utilizes a 6411 bulb size for interior illumination across the various production periods listed in the provided technical data. Information covers the span from 1966 through 1978 without including any additional specifications or individual details.

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
1974-1978	6411
1966-1969	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 230 uses the 6411 bulb across all listed model years for the dome light position.
The years covered by these specifications span 1966-1969 and 1974-1978.
The 6411 is a festoon-type bulb, meaning it is cylindrical in form and makes contact at both ends rather than through a traditional socket base.
It carries the SV8.5 base designation, which refers to the metal end caps that conduct current at each end of the festoon body.
The 6411 bulb has a 36mm length, which is a critical fitment factor, as festoon bulbs must physically span the contact points of the holder to seat correctly.
It operates at 12 volts and 5 watts, placing it in the low-wattage range typical of interior courtesy lighting.
The 6411 designation follows ANSI standards, meaning it is a standardized bulb recognized across the United States and Canada.
Because festoon bulbs are sized by length, substituting a bulb of a different length, even with the same voltage and wattage rating, would result in an improper fit in the Mercedes-Benz 230 dome light housing.