Mercedes-Benz ML63 AMG Dome Light Bulb Size

The Mercedes-Benz ML63 AMG dome light requires bulb size 12961 or 6411 depending on the specific version of the component. Data for the bulb sizes covers the range from 2007 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	12961 (Rear)
2007	6411

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 12961 is a Philips part number designation for a T10 miniature wedge bulb. It uses a W2.1x9.5d base, operates at 12 volts, and draws 5 watts.
The 6411 follows the ANSI standard used in the US and Canada. It is a festoon-type bulb with a 36mm length, an SV8.5 base, 12 volts, and 5 watts of power consumption.
A wedge base bulb, such as the 12961, is held in its socket by the tension of the base contacts rather than by a separate locking mechanism, which distinguishes it from festoon and bayonet types.
A festoon bulb, such as the 6411, is cylindrical in form and seats by pressing lengthwise between two spring contacts at either end of the housing.
The Mercedes-Benz ML63 AMG uses the 6411 festoon bulb for the dome light in the 2007 model year, while the 12961 wedge bulb is specified for the rear dome light position in 2008-2011 model years.
The shift from a festoon base to a wedge base between the 2007 and 2008 model years indicates that the two bulb types are not interchangeable, as their socket designs are physically incompatible.
Both the 12961 and the 6411 share identical electrical ratings of 12 volts and 5 watts, meaning the difference between them is solely one of physical form and base type.
The 12961 is designated specifically for the rear dome light position in the 2008-2011 ML63 AMG, indicating that other dome light positions in those model years may use a different bulb specification.