Mercedes-Benz C220 front fog light utilizes an H3 bulb size while the rear fog light requires a P21/4W bulb size. The replacement chart covers 1994 to 1996 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 C220 uses the H3 bulb for the front fog light position across the 1994-1996 model years.
The H3 is a single-filament halogen bulb operating at 12V and 55W, fitted with a PK22s base, which is a pinch-type connector that distinguishes it from the more common screw-base halogen types.
The H3 bulb is governed by ECE standards, giving it approval for use in Europe, worldwide markets, the United States, and Japan.
The rear fog light position on the C220 across the same 1994-1996 model years uses the P21/4W bulb.
The P21/4W is a dual-filament signalling bulb rated at 12V with two wattage outputs, 21W and 4W, allowing it to serve two distinct lighting functions within a single unit.
The P21/4W uses a BAZ15d bayonet base, an offset-pin bayonet fitting that prevents incorrect installation of single-filament bulbs in sockets designed for dual-filament use.
Like the H3, the P21/4W is an ECE-standard bulb with worldwide approval.
The H3 and P21/4W are not interchangeable with each other, as they differ in base type, filament count, wattage, and intended function.