The Freightliner MB Line uses H4651 bulbs for high beam headlights and H4656 bulbs for low beam headlights, with each size serving distinct lighting functions. A replacement chart covering 1995 through 1997 documents the bulb specifications for this vehicle model across its production years.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Freightliner MB Line uses the H4651 bulb for the high beam headlight position across its 1995-1997 model years, exclusively in the Cab Over Engine configuration.
The H4651 is a sealed beam unit belonging to the rectangular sealed beam family, operating at 12 volts and rated for high beam output only, making it a single-function light source.
The low beam headlight position on the same 1995-1997 Cab Over Engine vehicles uses the H4656 bulb, a separate sealed beam unit designated solely for low beam operation.
The H4656 sealed beam shares the same rectangular form factor as the H4651 but is not interchangeable with it, as each is engineered for a distinct beam function with a different internal filament and lens optic arrangement.
Because the H4651 and H4656 are single-function sealed beams rather than dual-filament units, the MB Line Cab Over Engine requires separate bulbs for each beam position rather than a single bulb serving both functions.
The Cab Over Engine designation indicates that these fitments apply specifically to the forward-control body style, where the engine is positioned beneath the cab, a layout that can influence headlight housing placement and the sealed beam sizes required.