The Mercedes-Benz SLC43 AMG headlight bulb sizes include D1S, H15, and H7 options for high beam applications and D1S with H7 for low beam configurations. The replacement chart covers 2017 to 2020 model production 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 D1S bulb is a high-intensity discharge (HID) type that operates through an arc discharge between two electrodes sealed within a quartz capsule, producing a higher light output than conventional halogen bulbs. It appears across both high beam and low beam positions in the Mercedes-Benz SLC43 AMG for the 2017-2018 and 2020 model years when equipped with HID headlamps.
The H7 bulb is a halogen type with a two-pin base, rated at 55 watts and 12 volts. In the SLC43 AMG, it is specified for both the high beam and low beam positions in the 2019 model year.
The H15 bulb is a dual-filament halogen type that serves both a high beam and a daytime running light function within a single unit. It is specified for the 2020 SLC43 AMG high beam position only in vehicles without HID headlamps.
The 2020 SLC43 AMG high beam position carries two distinct bulb specifications depending on headlamp configuration: D1S for vehicles with HID headlamps and H15 for those without. These two types are not interchangeable, as they differ in operating technology, voltage requirements, and socket design.
The D1S bulb requires a dedicated ballast to regulate the high-voltage arc ignition, typically around 23,000 volts at startup, stepping down to approximately 85 volts during steady operation. Vehicles not equipped with HID headlamps lack this ballast hardware, making D1S fitment incompatible without significant electrical modification.
The 2019 model year is the only year in these specifications where the SLC43 AMG uses H7 halogen bulbs for both the high beam and low beam positions, rather than the D1S HID type found in surrounding model years.
The low beam position for the 2020 SLC43 AMG lists only the D1S specification, with no halogen alternative noted, unlike the high beam position for the same year which carries both HID and non-HID variants.
The D1S bulb type uses a standardized single-ended base defined under ECE regulation, meaning physical socket compatibility exists across vehicles using this standard. However, correct ballast matching and headlamp housing alignment remain necessary for proper function.