The Mercedes-Benz SL55 AMG uses H7 bulbs for high beam headlights and D2S or H7 bulbs for low beam headlights, with bulb size specifications varying by specific model configuration. The replacement chart covers 2003 to 2008 production years and details the corresponding bulb sizes for each headlight function.
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 holds ECE certification for use in Europe and worldwide markets, and carries approval in the United States and Japan as well.
The D2S is a high-intensity discharge xenon bulb rated at 85V and 35W, using a P32d-2 base. Unlike the H7, it requires an external ignitor to initiate and sustain the arc discharge that produces light.
The D2S is specified exclusively for projector-type housings. Fitting it into a housing not designed for projector optics would be outside its intended application.
The Mercedes-Benz SL55 AMG uses the H7 bulb for the high beam position across all model years from 2003-2008 without variation.
For the low beam position, the 2007-2008 model years carry only the D2S specification, indicating those vehicles were equipped solely with HID headlamps from the factory.
The 2003-2006 model years present two distinct low beam specifications: H7 for vehicles fitted with halogen capsule headlamps and D2S for those fitted with HID headlamps. These two bulb types are not interchangeable due to differences in operating voltage, base design, and housing requirements.
The H7 and D2S share no compatible base type. The H7 uses a PX26d base while the D2S uses a P32d-2 base, making physical substitution between the two impossible without modification.