The Mercedes-Benz 300SL uses 9004 bulbs for both high beam and low beam headlight applications, with the bulb size remaining consistent across both functions. The replacement chart covers vehicle production spanning 1990 to 1993, detailing bulb specifications for each model year within that range.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Mercedes-Benz 300SL uses the 9004 bulb type for both high beam and low beam headlights across the 1990-1993 model years.
The 9004 is a dual-filament halogen bulb, meaning a single bulb contains two separate filaments to serve both high and low beam functions within one housing.
The 9004 operates on a 12-volt electrical system and carries a wattage rating of 65W on the high beam filament and 45W on the low beam filament.
The 9004 uses a P29t base, which is a specific connector type that determines physical and electrical compatibility with the headlight socket.
The 9004 is an ANSI-standardized bulb type recognized in the United States and Canada, meaning it conforms to defined performance and dimensional standards within those markets.
Because the 9004 serves both beam functions in the 300SL, a single bulb failure affects both high and low beam output in the corresponding headlight assembly.
The P29t base of the 9004 is not interchangeable with other common halogen base types such as H4 or 9007, despite the H4 and 9007 also being dual-filament designs.