The Mercedes-Benz C63 AMG tail light requires a P21W bulb size for the specific lighting component located at the rear of the vehicle. Data for the specified bulb covers the range from 2008 to 2010.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The P21W is the sole bulb type listed across all outer tail light positions for the Mercedes-Benz C63 AMG, covering model years 2008-2014.
The P21W is an ECE-standard single-filament bulb, meaning it produces light through one filament wire rather than two, which limits it to a single lighting function per socket.
The P21W operates at 12 volts and 21 watts, a wattage rating typical of signalling applications such as brake lights and turn signals in European-market vehicles.
The BA15s bayonet base on the P21W features a single locating pin on its collar, distinguishing it from the BA15d base, which carries two offset pins. These two base types are not interchangeable.
The ECE designation indicates the P21W conforms to United Nations Economic Commission for Europe regulations, a standard adopted across European and many worldwide markets.
Because the P21W is a single-filament bulb, it is not a substitute for dual-filament types such as the P21/5W, which shares the same general form but uses a BA15d base and serves combined stop and tail functions.