The Mercedes-Benz C250 parking light requires a bulb size of 12961 for the lighting system. Data for the specified component covers the range from 2012 to 2014.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The 12961 is the sole bulb size listed for the front parking light position on the Mercedes-Benz C250 across the 2012-2014 model years.
The 12961 is a Philips part number designating a miniature wedge bulb in the T10 form factor, which is one of the most widely used bulb types in automotive parking light applications.
The T10 bulb uses a W2.1x9.5d base, a wedge-style connector that relies on spring tension from the socket rather than a locking pin or bayonet mechanism to maintain contact.
The 12961 operates at 12 volts and draws 5 watts, which is characteristic of low-intensity indicator and parking light duties rather than primary illumination functions.
The specifications list the 12961 under two separate fitment conditions for each model year: a general entry and an entry designated specifically for vehicles equipped with halogen capsule headlamps.
Both fitment conditions for the 2012-2014 C250 reference the same 12961 bulb size, indicating that the halogen capsule headlamp configuration does not require a different parking light bulb from the standard configuration.