Mercedes-Benz 300SD Headlight Bulb Size

The Mercedes-Benz 300SD high beam and low beam headlight bulb sizes include 9003, H6054, and H5001 for high beam applications, with low beam configurations utilizing 9003, H6054, and H5006 bulb sizes. The replacement chart covers vehicle production years spanning 1978 to 1993, detailing bulb specifications across the model's manufacturing period.

The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.

High Beam Headlight

Years	Bulb Size
1992-1993	9003
1981-1985	H6054
1978-1980	H5001

Low Beam Headlight

Years	Bulb Size
1992-1993	9003
1981-1985	H6054
1978-1980	H5006

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Dual-filament halogen bulb with P43t base. 12V, 60W/55W.	9003
ANSI standard (US & Canada). 5x7-inch rectangular sealed beam unit. Not a replaceable bulb — the entire unit is replaced. 12V.	H6054
ANSI standard (US & Canada). 4-inch square sealed beam unit. Not a replaceable bulb — the entire unit is replaced. 12V.	H5001
ANSI standard (US & Canada). 5.75-inch round sealed beam unit. Not a replaceable bulb — the entire unit is replaced. 12V.	H5006

Other Locations

Additional Notes

The Mercedes-Benz 300SD uses three distinct headlight technologies across its model years: the 9003 halogen bulb for 1992-1993, the H6054 sealed beam unit for 1981-1985, and sealed beam units H5001 and H5006 for 1978-1980.
The 9003 is a dual-filament halogen bulb rated at 12V with a 60W high beam filament and a 55W low beam filament, housed in a single unit with a P43t base. Because both filaments occupy one bulb, the 9003 serves both high and low beam functions simultaneously.
For 1992-1993, the 9003 bulb is a replaceable component, meaning only the bulb itself is swapped out rather than the entire headlight assembly.
The H6054, H5001, and H5006 are all sealed beam units, meaning the lens, reflector, and filament are fused into a single non-serviceable assembly. When a filament fails, the entire unit requires replacement.
For 1981-1985, both high and low beam positions use the same H6054 unit, a 5x7-inch rectangular sealed beam operating at 12V.
For 1978-1980, the high and low beam positions use different sealed beam units. The high beam position uses the H5001, a 4-inch square sealed beam, while the low beam position uses the H5006, a 5.75-inch round sealed beam. These two units are not interchangeable with each other.
The H5001 and H5006 differ in both shape and function, making cross-substitution between the two positions on 1978-1980 models incorrect even though both operate at 12V under the same ANSI standard.
All bulb and sealed beam types listed across the full model year range conform to ANSI standards applicable in the United States and Canada.