Mercedes-Benz S55 AMG License Plate Bulb Size

The Mercedes-Benz S55 AMG license plate light requires a DE3423 bulb size for proper installation and function. Data for the specific component covers the range from 2001 through 2006.

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
2001-2006	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 S55 AMG uses the DE3423 bulb across all listed model years, spanning 2001-2006, making it a consistent fitment throughout the vehicle's production run in those years.
The DE3423 is classified as a festoon bulb, a cylindrical form factor that seats between two spring-loaded end caps rather than using a bayonet or wedge base.
End-cap contacts are the defining connection method of the DE3423, meaning the bulb makes electrical contact at both flat ends rather than through pins or a base collar.
The DE3423 has a 41mm length, which is the critical fitment specification for the license plate housing on the S55 AMG. A festoon bulb of a different length will not seat correctly in the same holder.
The DE3423 operates at 12 volts, consistent with the standard electrical system voltage found in passenger vehicles.
The DE3423 carries an ANSI designation, meaning it conforms to a standardized specification recognized in both the United States and Canada, which governs its physical and electrical characteristics.
Because the DE3423 is an ANSI-standardized part, compatible replacement bulbs from different manufacturers sharing the same designation are expected to share identical physical and electrical properties.
The festoon form factor of the DE3423 is common in license plate, interior map, and dome light applications, where the bulb spans across two contact points within an enclosed housing.