Mercedes-Benz SL65 AMG License Plate Bulb Size

The Mercedes-Benz SL65 AMG license plate requires a DE3423 bulb size for proper illumination of the rear vehicle identification area. Data for the specified component covers the range from 2005 through 2011.

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
2011	DE3423
2005-2009	DE3423

Bulb Specifications

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

Other Locations

Additional Notes

The Mercedes-Benz SL65 AMG uses the DE3423 bulb for its license plate lighting across the 2005-2011 model years.
The DE3423 is a festoon-type bulb, meaning it is cylindrical in shape and makes electrical contact through metal caps at each end rather than through a base socket or pins.
The bulb measures 41mm in length, which is the span between its two end-cap contacts and determines physical fitment within the license plate lamp housing.
It operates on a 12-volt electrical system, consistent with standard automotive low-voltage architecture.
The DE3423 designation follows ANSI standards, indicating the bulb meets defined performance and physical specifications recognized across the United States and Canada.
Because festoon bulbs are sized by their contact-to-contact length, 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.