Mercedes-Benz CL65 AMG Map Light Bulb Size

The Mercedes-Benz CL65 AMG map light utilizes 12961 and 6411 bulb sizes for interior illumination across various production periods. Data for the specified lighting components covers the span from 2005 through 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
2010-2014	12961
2008-2009	6411
2005-2006	12961

Bulb Specifications

Description	Bulb Size
Philips part number. Miniature wedge bulb (T10) with W2.1x9.5d base. 12V, 5W.	12961
ANSI standard (US & Canada). Festoon bulb, 36mm length, SV8.5 base. 12V, 5W.	6411

Other Locations

Additional Notes

The Mercedes-Benz CL65 AMG map light specifications reference two distinct bulb types across the model's production years: the 12961 and the 6411.
The 12961 is a Philips part number designating a miniature wedge bulb in the T10 form factor, fitted with a W2.1x9.5d base and rated at 12V and 5W.
The T10 wedge base design of the 12961 means the bulb is held in place by friction against the socket walls rather than by a bayonet or screw mechanism.
The 6411 is an ANSI-standard designation recognized in the United States and Canada, identifying a festoon bulb with a 36mm length, an SV8.5 base, and identical 12V, 5W ratings to the 12961.
A festoon bulb with an SV8.5 base makes contact at both flat ends of the bulb body, a mounting style physically incompatible with the wedge socket used by the 12961.
Despite sharing the same voltage and wattage ratings, the 12961 and 6411 use entirely different base types and are not interchangeable with one another.
The CL65 AMG requires the 12961 for model years 2005-2006 and 2010-2014, while the 6411 is specified for 2008-2009.
The two-bulb-type split across the model's production run indicates a socket design change occurred at some point in the CL65 AMG's manufacturing history.
Both bulb types operate on the standard 12-volt automotive electrical system, reflecting conventional low-voltage interior lighting practice.
The 5W power rating shared by both bulbs places them in the category of low-output incandescent interior lamps, typical for map and courtesy lighting applications.