The Mercedes-Benz CL63 AMG parking light requires a bulb size of 12961 for the lighting system. Data for the specified component 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 CL63 AMG uses the 12961 bulb for the front parking light 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 number indicating a width of 10 millimeters.
The W2.1x9.5d base type is a wedge-style connector, meaning the bulb is held in place by tension from the socket rather than by a bayonet or screw mechanism.
At 5 watts, the 12961 is a low-power bulb consistent with parking light applications, where continuous illumination at minimal energy draw is the functional requirement.
The W2.1x9.5d base specification is a precise fitment standard, and substituting a bulb with a different base type would result in an incompatible fit regardless of voltage or wattage similarity.