Mercedes-Benz GL550 Daytime Running Light Bulb Size
The Mercedes-Benz GL550 daytime running light requires a bulb size of 12278 for the lighting system. Data for the specific component covers the range from 2008 to 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 |
|---|---|
| 2008-2011 | 12278 |
Bulb Specifications
| Description | Bulb Size |
|---|---|
| Philips part number. Single-filament halogen bulb with PG18.5d-3 base. 12V, 26W. | 12278 |