The Mercedes-Benz C350 parking light requires a 12961 bulb size for proper installation and function within the lighting assembly. Data for the specified component covers the range from 2006 through 2015.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Mercedes-Benz C350 uses the 12961 bulb for the front parking light across the 2006-2015 model years.
The 12961 is a Philips part number designating a miniature wedge bulb in the T10 form factor with a W2.1x9.5d base, rated at 12 volts and 5 watts.
The T10 wedge bulb is a small, wedge-shaped lamp that relies on its tapered plastic base to make electrical contact within the socket, requiring no separate metal base or pins.
The W2.1x9.5d base designation refers to a standardized wedge base type, where the figures describe the contact width and overall body length in millimeters, ensuring consistent fitment across compatible sockets.
At 5 watts, the 12961 is a low-power bulb, consistent with its role as a parking light rather than a primary illumination source.
The 2008-2015 model years carry a separate fitment notation specifying the 12961 for vehicles equipped with halogen capsule headlamps, indicating that headlamp type is a relevant variable for correct front parking light fitment on the Mercedes-Benz C350 during those years.
The 2006-2007 model years list the 12961 without any headlamp-type qualifier, suggesting a single fitment applies regardless of headlamp configuration for those years.
Because the same bulb number, 12961, appears under both the general and halogen capsule headlamp entries for 2008-2015, the headlamp notation functions as a fitment condition to confirm rather than a signal of a different bulb size.