Mercedes-Benz E300 License Plate Bulb Size

The Mercedes-Benz E300 license plate light requires a DE3423 bulb size for proper installation and function within the rear exterior lighting assembly. Available data for the specified vehicle covers the period from 1995 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
1995-1999	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 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 DE3423 has a rated length of 41mm, which is the span between its two end caps and determines physical fitment within the license plate lamp housing.
The bulb operates at 12 volts, consistent with the standard electrical system voltage found in passenger vehicles.
The DE3423 carries an ANSI designation, indicating it conforms to a standardized specification recognized across the United States and Canada, which governs its electrical and physical characteristics.
The Mercedes-Benz E300 uses the DE3423 bulb for the license plate lamp across the 1995-1999 model years, representing the full span of years covered in these specifications.
Because festoon bulbs are defined by their length and contact style, substituting a festoon bulb of a different length, such as a 36mm or 44mm unit, would result in an improper fit even if the voltage rating matches.