The Mercedes-Benz 350SDL uses 9003 bulb size for both high beam and low beam headlight applications. The replacement chart covers 1990 to 1991 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 9003 is a dual-filament halogen bulb, meaning a single unit contains two separate filaments: one rated at 60W for high beam operation and one at 55W for low beam operation.
The Mercedes-Benz 350SDL uses the 9003 bulb for both high beam and low beam headlights across the 1990-1991 model years, with a single bulb type serving both functions due to its dual-filament design.
The 9003 operates on a 12-volt electrical system, which is standard for passenger vehicle applications of its era.
The 9003 carries the P43t base designation, a bayonet-style mount with a 43mm collar. This base type is not universally interchangeable with other headlight bases, and substituting a bulb with a different base is not possible without modification to the housing.
The 9003 is defined under ANSI standards and is the designated specification for the United States and Canadian markets. This standardization means the bulb conforms to regulated output and dimensional requirements set by North American automotive lighting authorities.
The HB2 designation is the international equivalent of the 9003, sharing identical electrical and physical characteristics. Despite the different labeling, both refer to the same bulb specification.