Mercedes-Benz S320 License Plate Bulb Size

The Mercedes-Benz S320 license plate light requires a bulb with the specific size DE3423 for proper installation and function. Available data for the lighting components covers the period from 1994 through 1999.

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 Type	Shop
1994-1999	DE3423	Check Price

Bulb Specifications

Description	Type	Shop
ANSI standard (US & Canada). Festoon bulb, 41mm length, end-cap contacts. 12V.	DE3423	Check Price

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Additional Notes

The Mercedes-Benz S320 uses the DE3423 bulb for the license plate position across all listed model years, spanning 1994-1999.
The DE3423 is a festoon-type bulb, meaning it is cylindrical in form and makes electrical contact through metal caps at each end rather than through a base socket or pins.
The bulb measures 41mm in length, which is the span between its two end caps and determines physical fitment within the license plate lamp housing.
DE3423 is an ANSI-designated bulb code, indicating it conforms to a standardized specification recognized in both the United States and Canada.
The bulb operates on a 12-volt electrical system, consistent with the standard automotive voltage found in passenger vehicles of this type.
Because the DE3423 designation is an ANSI standard rather than a proprietary code, bulbs carrying this designation from different manufacturers are generally interchangeable, provided the 41mm length and end-cap contact configuration are met.