The Mercedes-Benz C63 AMG side marker utilizes a bulb size of 12961 for the lighting components. Data for the specific bulb requirements 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.
The Mercedes-Benz C63 AMG uses the 12961 bulb for both front and rear side markers across the 2008-2014 model years.
The 12961 is a Philips part number designating a miniature wedge bulb in the T10 form factor, operating at 12 volts and rated at 5 watts.
The T10 designation refers to the bulb's tubular shape, with the numerical value corresponding to its width in eighths of an inch, making it one of the most widely used miniature bulb formats in automotive lighting.
The base type on the 12961 is W2.1x9.5d, a wedge-style base that relies on tension from the socket rather than a bayonet or screw mechanism to maintain contact.
Because the same bulb size applies to both the front and rear side marker positions on the C63 AMG, a single bulb type serves both locations without substitution.
The W2.1x9.5d base is not interchangeable with bayonet or festoon bases, and fitment requires a socket specifically designed for the wedge format.
At 5 watts and 12 volts, the 12961 draws approximately 0.42 amperes, which is consistent with low-current marker light circuits typical of passenger vehicles.
The uniform bulb specification across all listed model years indicates no mid-cycle change to the side marker lighting hardware on the C63 AMG during the 2008-2014 production period.