The Mercedes-Benz 450SLC uses H5001 bulbs for high beam headlights and H5006 bulbs for low beam headlights, with each size serving distinct lighting functions. The replacement chart covers 1973 to 1980 production years and documents bulb size specifications across the model's manufacturing span.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Mercedes-Benz 450SLC uses the H5001 bulb size for high beam headlights across all model years from 1973-1980.
The H5001 is a 4-inch square sealed beam unit operating at 12V. It conforms to ANSI standards applicable in the US and Canada, and the entire unit is replaced rather than an internal bulb.
The low beam headlight position across all 1973-1980 model years calls for the H5006 bulb size.
The H5006 is a 5.75-inch round sealed beam unit, also rated at 12V and built to the same ANSI standard as the H5001. Like the H5001, the full sealed unit is replaced when the light fails.
Because the H5001 and H5006 are sealed beam units of different physical forms, one cannot substitute for the other. The square high beam housing and the round low beam housing are not interchangeable.
Sealed beam technology integrates the filament, reflector, and lens into a single fused glass assembly. When the filament fails, the entire assembly is discarded and replaced as a unit.
The ANSI standardization of both bulb types means that any H5001 or H5006 unit from a compliant manufacturer is dimensionally and electrically equivalent, regardless of brand.
Both sealed beam types operate on a 12V electrical system, which is consistent with the standard automotive electrical architecture used in the 450SLC.