Mercedes-Benz CLK430 License Plate Bulb Size

The Mercedes-Benz CLK430 uses a DE3423 bulb for the license plate lighting component located at the rear of the vehicle. Data for the bulb specifications covers the period from 1999 through 2003.

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
1999-2003	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 CLK430 uses the DE3423 bulb for the license plate position across all listed model years, spanning 1999-2003.
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 has a length of 41mm, which is a standard festoon size widely used in European and North American vehicle applications.
It operates at 12 volts, consistent with the standard electrical systems found in passenger vehicles.
The DE3423 carries an ANSI designation, indicating it conforms to specifications recognized in both the United States and Canada.
Because festoon bulbs rely on end-cap contact rather than a keyed base, physical length is the primary fitment factor. A bulb of a different length will not seat correctly in the license plate housing.
The DE3423 designation is specific to the ANSI classification system. Bulbs sold under other naming conventions, such as European or JIS part numbers, may share the same physical form but should be verified against the 41mm length and 12V rating before substitution.