Mercedes-Benz S63 AMG Back Up Light Bulb Size

The Mercedes-Benz S63 AMG back up light utilizes 921 and 12184 bulb sizes for the rear illumination components. Data for the specific lighting requirements covers the period from 2008 through 2013.

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
2009-2013	921
2008	12184

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Wedge bulb (T15). 12V, 16W.	921
Philips part number. Halogen bulb, specialty application. 12V.	12184

Other Locations

Additional Notes

The Mercedes-Benz S63 AMG uses two distinct back up light bulb types across its model years: the 921 and the 12184.
The 921 is an ANSI-standardized bulb recognized across the United States and Canada, operating at 12 volts with a 16-watt output and a T15 wedge base.
A T15 wedge base bulb uses a plastic or glass base that wedges directly into the socket without a separate metal connector, making it a self-contained unit.
The 921 bulb is specified for the 2009-2013 S63 AMG.
The 2008 S63 AMG uses the 12184, a Philips part number designating a 12-volt halogen bulb intended for specialty applications.
The 12184 is a manufacturer-specific part number rather than an ANSI industry-standard designation, meaning it is not interchangeable by number with bulbs from other manufacturers without cross-referencing.
The 921 and 12184 are not listed as interchangeable within these specifications, and the 2008 model year stands as a distinct fitment from the 2009-2013 range.
Halogen bulbs, such as the 12184, produce light through a tungsten filament enclosed with halogen gas, which extends filament life compared to standard incandescent bulbs.