Mercedes-Benz ML320 License Plate Bulb Size

The Mercedes-Benz ML320 license plate requires a DE3423 bulb size for proper illumination of the rear exterior area. Available data for the specified component covers the range from 1998 to 2009.

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
2007-2009	DE3423	Check Price
1998-2003	DE3423	Check Price

Bulb Specifications

Description	Type	Shop
ANSI standard (US & Canada). Festoon bulb, 41mm length, end-cap contacts. 12V.	DE3423	Check Price

Other Locations

Additional Notes

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 or pins.
The DE3423 operates at 12 volts, which is consistent with standard 12-volt automotive electrical systems.
The DE3423 has a 41mm length, which is the critical fitment factor for festoon bulbs, as the housing contacts must align precisely with the end caps for the bulb to seat and function correctly.
The DE3423 is rated under the ANSI standard applicable to the United States and Canada, indicating it conforms to a defined set of electrical and physical tolerances recognized in North American markets.
The Mercedes-Benz ML320 uses the DE3423 across all model years listed in the specifications, from 1998-2003 and 2007-2009, with no variation in bulb size across those years.
Festoon bulbs of different lengths are generally not interchangeable even when voltage ratings match, as an incorrect length will prevent proper contact with the housing terminals.
The end-cap contact design of the DE3423 is a common festoon configuration, but it is distinct from dome-style festoon bulbs that use a different contact arrangement, making type verification relevant before replacement.