Mercedes-Benz SLK320 License Plate Bulb Size

The Mercedes-Benz SLK320 license plate light requires a bulb with the specific DE3423 size for proper installation. Data for the bulb size covers the range from 2001 to 2004.

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
2001-2004	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 SLK320 uses the DE3423 bulb for the license plate position across the 2001-2004 model years.
The DE3423 is a festoon-type bulb, meaning it is cylindrical in shape with flat metal contacts at each end rather than a screw or bayonet base.
The DE3423 has a nominal length of 41mm, which is a standard festoon size widely used in European and North American vehicle applications.
The bulb operates at 12 volts, consistent with the standard electrical systems found in passenger vehicles.
The DE3423 carries an ANSI designation, indicating it meets the standardized performance and physical specifications recognized in the United States and Canada.
Because the DE3423 is an ANSI-standardized part, other festoon bulbs sharing the same 41mm length and end-cap contact configuration are generally considered interchangeable, provided they match the 12V rating.