The Mercedes-Benz C55 AMG tail light requires a P21/5W bulb size for proper illumination. Data for 2005 through 2006 provides the specific information for the lighting components.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The outer tail light on the Mercedes-Benz C55 AMG uses the P21/5W bulb across the 2005-2006 model years.
The P21/5W is an ECE-standard bulb, meaning it conforms to European and internationally recognized automotive lighting regulations.
As a dual-filament bulb, the P21/5W carries two separate filaments within a single glass envelope, operating at 21 watts and 5 watts respectively, which allows it to serve two distinct lighting functions from one unit.
The P21/5W uses a BAY15d bayonet base, a two-pin offset base design where the two pins are positioned at different heights to prevent incorrect installation orientation.
The bulb operates on a 12-volt electrical system, consistent with standard automotive voltage.