Mercedes-Benz CL63 AMG License Plate Bulb Size

The Mercedes-Benz CL63 AMG license plate light requires a bulb size of 12961 for the rear exterior lighting assembly. Data for the specific component covers the range from 2008 to 2014.

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
2008-2014	12961

Bulb Specifications

Description	Bulb Size
Philips part number. Miniature wedge bulb (T10) with W2.1x9.5d base. 12V, 5W.	12961

Other Locations

Additional Notes

The Mercedes-Benz CL63 AMG uses the 12961 bulb designation across all listed model years from 2008-2014 for the license plate position.
The 12961 is a Philips part number referencing a T10 miniature wedge bulb, a format widely used in low-current automotive lighting applications.
The T10 designation refers to the bulb's tubular envelope, with the number indicating a width of ten-eighths of an inch in the traditional bulb sizing system.
The base type is W2.1x9.5d, a wedge-style base where the glass envelope itself acts as the retention mechanism rather than a separate metal base, fitting directly into a corresponding socket.
The bulb operates at 12 volts and 5 watts, placing it in the low-wattage range appropriate for a license plate illumination circuit.
The consistent fitment of the same bulb across the 2008-2014 CL63 AMG indicates that no socket or specification change occurred within this production span for this lighting position.
The W2.1x9.5d base is not universally interchangeable with other wedge base types; substitutions using physically similar but dimensionally distinct bases risk poor socket retention or electrical contact failure.