Mercedes-Benz C250 high beam headlight bulbs use H7 size, while low beam headlight bulbs use H7 or D1S size depending on configuration. The replacement chart covers 2012 to 2014 vehicle 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 H7 bulb is a single-filament halogen type operating at 12V and 55W, fitted with a PX26d base. It carries ECE certification for use in Europe and worldwide markets, and is also approved for use in the United States and Japan.
The D1S is a high-intensity discharge (HID) xenon bulb rated at 85V and 35W, using a PK32d-2 base. Unlike the H7, it incorporates an integral ignitor within the bulb assembly and is designed exclusively for projector-type headlamp housings.
The Mercedes-Benz C250 uses the H7 bulb across all three model years (2012-2014) for the high beam headlight position, with no alternative fitment listed for that function.
The low beam headlight position on the C250 (2012-2014) accepts either an H7 or a D1S bulb, depending on whether the vehicle is equipped with standard halogen or HID headlamps respectively.
The H7 and D1S bulbs are not interchangeable. Beyond their differing voltage and wattage ratings, the H7 uses a halogen-compatible PX26d base while the D1S uses a PK32d-2 base, and the D1S requires a projector-type housing that standard halogen reflector housings do not provide.
The presence of two listed low beam fitments for each model year (2012-2014) reflects a factory trim-level distinction. Vehicles specified as having HID headlamps take the D1S, while those without that designation take the H7.