Mercedes-Benz E420 License Plate Bulb Size

The Mercedes-Benz E420 license plate bulb uses a DE3423 size specification for this model. The replacement chart covers vehicle production spanning 1994 to 1997.

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 Size
1997	DE3423
1994-1995	DE3423

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Festoon bulb, 41mm length, end-cap contacts. 12V.	DE3423

Other Locations

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 measures 41mm in length, which is the critical fitment factor for festoon bulbs, as the housing retains the bulb by tension between its two end contacts.
The bulb operates at 12 volts, consistent with the standard electrical systems found in passenger vehicles of this type.
The DE3423 carries ANSI standardization applicable to the United States and Canada, indicating it conforms to a defined set of electrical and physical tolerances recognized across those markets.
The Mercedes-Benz E420 uses the DE3423 across the 1994-1997 model years for the license plate position, with no variation in bulb size across that span.
Festoon bulbs of differing lengths are not interchangeable even when voltage ratings match, as an incorrect length will either fail to make contact or will not seat securely within the housing.