Mercedes-Benz C55 AMG License Plate Bulb Size

The Mercedes-Benz C55 AMG license plate light requires a unique bulb size identified as DE3423 for the rear exterior lighting assembly. Data for the specific component covers the range from 2005 through 2006.

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
2005-2006	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 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 span between its two end caps and determines physical fitment within the festoon holder.
The DE3423 operates at 12 volts, consistent with standard automotive electrical systems.
The DE3423 carries ANSI designation, indicating it conforms to a standardized specification recognized across the United States and Canada.
The Mercedes-Benz C55 AMG uses the DE3423 bulb for the license plate position across the 2005-2006 model years.
Festoon bulbs are not universally interchangeable despite similar appearances; the 41mm length of the DE3423 is a fitment-critical value, as holders are sized to specific lengths and a mismatched length will result in poor contact or physical incompatibility.