Mercedes-Benz SLK55 AMG License Plate Bulb Size

The Mercedes-Benz SLK55 AMG license plate light requires a DE3423 bulb size for proper installation and function. Available data for the specified component covers the period from 2005 through 2010.

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
2005-2010	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 SLK55 AMG uses the DE3423 bulb for the license plate position across the 2005-2010 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.
The bulb measures 41mm in length, which is the span between its two end caps and determines physical fitment within the license plate housing.
It operates at 12 volts, consistent with the standard electrical systems found in passenger vehicles.
The DE3423 carries ANSI designation, indicating it conforms to a standardized specification recognized in both the United States and Canada.
Festoon bulbs of the same length are sometimes cross-compatible, but the 41mm specification is a fixed fitment requirement for this application, and substituting a bulb of a different length risks poor contact or failure to seat correctly in the housing.