The Mercedes-Benz SLK320 high beam headlight bulb uses H7 size, while low beam headlight bulbs are available in H7, D2S, and D2R sizes. The replacement chart covers 2001 to 2004 model 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 H7 bulb is the most frequently specified type across the Mercedes-Benz SLK320 headlight data, appearing in both high beam and halogen low beam positions across all four model years (2001-2004). It is a single-filament halogen bulb rated at 12V and 55W, fitted with a PX26d base, and carries ECE approval for use in Europe, worldwide markets, the United States, and Japan.
The high beam headlight position on the SLK320 uses the H7 bulb exclusively across all listed model years (2001-2004), with no alternative bulb type specified for that position.
The low beam headlight position on the SLK320 accommodates two distinct and incompatible technologies depending on the headlamp system installed. Vehicles equipped with halogen capsule headlamps use the H7 bulb, while vehicles equipped with HID headlamps use a discharge bulb type.
For the 2004 model year, the HID low beam option specifies the D2S bulb, which uses a P32d-2 base and is designed for projector-type headlamp housings. This differs from the D2R bulb specified for the 2001-2003 model years, which uses a P32d-3 base and is intended for reflector-type housings. The two bulb types are not interchangeable due to their differing base configurations and housing requirements.
Both D2S and D2R are HID (xenon) discharge bulbs rated at 85V and 35W. Despite their identical wattage and voltage ratings, the physical base and optical design of each type are specific to their respective housing styles, making cross-substitution between them incompatible.
All HID bulb types listed for the SLK320 require an external ignitor to operate. This component generates the high-voltage pulse needed to initiate the electrical arc within the xenon gas, and it is separate from the bulb itself.
All bulb types specified across the SLK320 headlight data conform to ECE standards, indicating they are certified for use in markets that recognize European lighting regulations, in addition to the United States and Japan in the case of the H7.
The low beam headlight specification for the Mercedes-Benz SLK320 requires confirmation of the installed headlamp system type before a replacement bulb is selected, as halogen and HID configurations call for entirely different bulbs with incompatible bases and operating voltages.