Mercedes-Benz SL550 Courtesy Bulb Size
The Mercedes-Benz SL550 courtesy light utilizes bulb size DE3423 or 12961 depending on the specific version required for the vehicle. Data for the listed components covers the range from 2007 to 2012.
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 |
|---|---|
| 2011-2012 | DE3423 |
| 2009 | DE3423 |
| 2007-2008 | 12961 |
Bulb Specifications
| Description | Bulb Size |
|---|---|
| ANSI standard (US & Canada). Festoon bulb, 41mm length, end-cap contacts. 12V. | DE3423 |
| Philips part number. Miniature wedge bulb (T10) with W2.1x9.5d base. 12V, 5W. | 12961 |