The Mercedes-Benz C36 AMG front side marker uses a 2357NA bulb with P21/5W size, while the rear side marker requires a 12821 bulb size. The replacement chart covers 1995 to 1997 model production years with corresponding bulb size specifications.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Mercedes-Benz C36 AMG uses two distinct front side marker bulb types across its model years: the 2357NA for 1997 and the P21/5W for 1995-1996. These are not interchangeable, as they originate from different international standards bodies.
Both the 2357NA and P21/5W share a BAY15d bayonet base, which is a dual-contact offset-pin base designed to prevent incorrect installation by positioning the two pins at different heights on the base collar.
Despite sharing the same base type, the 2357NA and P21/5W differ in wattage output. The 2357NA operates at 26.9W/8W while the P21/5W operates at 21W/5W, meaning substituting one for the other would produce different light intensity levels.
The 2357NA carries an ANSI designation, indicating it conforms to North American standards, while the P21/5W follows ECE regulations used in Europe and other international markets. This distinction reflects a regional specification change between the 1996 and 1997 model years of the C36 AMG.
The natural amber glass of the 2357NA produces its amber color through the glass itself rather than through a colored lens or housing, which is a characteristic of ANSI-standard natural amber bulbs used in North American side marker applications.
Both the 2357NA and P21/5W are dual-filament bulbs, meaning each contains two separate filaments within a single envelope, typically serving two distinct lighting functions such as running light and turn signal.
The rear side marker bulb for the C36 AMG is the 12821 across all three model years, 1995-1997, representing a consistent specification throughout the vehicle's production run.
The 12821 is a Philips part number referencing a T10 miniature wedge bulb with a W2.1x9.5d base. The wedge base design relies on the glass envelope itself being pinched and held by the socket, with no separate metal base component.
The 12821 is a single-filament bulb rated at 12V and 5W, placing it in the low-wattage category typical of side marker and courtesy lighting applications rather than primary signalling or illumination functions.
The front and rear side marker positions on the C36 AMG require entirely different bulb families: dual-filament bayonet-base bulbs at the front and a single-filament wedge-base bulb at the rear, making the two positions non-interchangeable by both base type and filament configuration.