Mercedes-Benz 350SL Dome Light Bulb Size

The Mercedes-Benz 350SL dome light requires a bulb size of 6411 for the interior lighting system. Data for the specified component covers the period from 1972 through 1973.

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
1972-1973	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 6411 is the dome light bulb size for the Mercedes-Benz 350SL across the 1972-1973 model years.
The 6411 follows the ANSI standard, meaning it meets the specifications defined by the American National Standards Institute for use in the US and Canada.
The 6411 is a festoon-type bulb, which is a cylindrical lamp that mounts by contact pressure between two spring clips at each end rather than by a screw or bayonet base.
The bulb measures 36mm in length, which is the critical fitment factor for festoon bulbs, as the holder span must match the bulb length for proper contact.
The 6411 uses an SV8.5 base, a designation that refers to a festoon base with an 8.5mm cap width.
The bulb operates at 12 volts and draws 5 watts, consistent with standard low-current interior lighting in 12-volt automotive electrical systems.