Mercedes-Benz CLS63 AMG S Dome Light Bulb Size

The Mercedes-Benz CLS63 AMG S dome light requires a 6411 bulb size for proper installation within the interior overhead lighting housing. Available data for the specific bulb covers the period from 2014 through 2018.

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
2014-2018	6411

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Festoon bulb, 36mm length, SV8.5 base. 12V, 5W.	6411

Other Locations

Additional Notes

The Mercedes-Benz CLS63 AMG S uses the 6411 bulb for the dome light across the 2014-2018 model years.
The 6411 is a festoon-style bulb, meaning it is cylindrical in shape and held in place by contact pressure at both ends rather than by a screw or bayonet base.
The 6411 bulb measures 36mm in length, which is the span between its two end caps and determines physical fitment within the dome light housing.
It uses an SV8.5 base, a designation that refers to the contact cap size at each end of the festoon body, which must match the spring clips in the fixture.
The 6411 operates at 12 volts and 5 watts, consistent with standard low-power interior lighting in passenger vehicles.
The 6411 designation is an ANSI standard recognized in both the United States and Canada, indicating a standardized specification rather than a proprietary part number.
Because festoon bulbs rely on end-cap contact rather than a keyed base, physical length is the primary fitment factor; a bulb of a different length may not make reliable contact or may not seat within the housing.