Mercedes-Benz 560SEL License Plate Bulb Size

The Mercedes-Benz 560SEL license plate component requires a DE3423 bulb size for proper illumination of the rear registration area. Available data for the specified lighting equipment covers the period from 1986 through 1991.

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
1986-1991	DE3423

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Festoon bulb, 41mm length, end-cap contacts. 12V.	DE3423

Other Locations

Additional Notes

The Mercedes-Benz 560SEL uses the DE3423 bulb for its license plate lighting across the 1986-1991 model years.
The DE3423 is a festoon-type bulb, meaning it is cylindrical in shape and makes electrical contact through metal caps at both ends rather than through a base socket or pins.
The 41mm length of the DE3423 refers to the distance between its two end caps, which determines physical fitment within the license plate lamp housing.
The DE3423 operates at 12 volts, consistent with the standard electrical system voltage found in passenger vehicles of this era.
The DE3423 carries ANSI designation, indicating it conforms to a standardized specification recognized in both the United States and Canada.
Because the DE3423 is an ANSI-standardized festoon bulb, it is interchangeable with other bulbs sharing the same 41mm length and end-cap contact design, provided the voltage rating is also matched.