Mercedes-Benz SL65 AMG Headlight Bulb Size

Additional Notes

• The D1S and D2S bulbs specified for the Mercedes-Benz SL65 AMG are both HID (xenon) discharge types operating at 85V and 35W, placing them in a distinct electrical category from the 12V, 55W H7 halogen bulbs also found in this model's fitment history.
• The D1S bulb carries a PK32d-2 base and integrates its ignitor directly into the bulb body, whereas the D2S uses a P32d-2 base and depends on an external ignitor housed separately within the headlamp assembly. These two bases are not interchangeable despite the bulbs sharing identical wattage and voltage ratings.
• Both D1S and D2S bulbs are designed exclusively for projector-type housings. Installing either type into a reflector housing would produce improper light distribution.
• The H7 is a single-filament halogen bulb with a PX26d base, approved under ECE standards and additionally recognized in the United States and Japan. On the SL65 AMG, it served high beam and, in certain configurations, low beam functions.
• For the 2013-2016 model years, the SL65 AMG uses D1S bulbs in both the high beam and low beam positions, representing a fully HID headlamp system across both functions.
• The 2005 and 2006 model years present a dual-fitment situation for the low beam position: H7 applies to vehicles equipped with halogen capsule headlamps, while D2S applies to those fitted with HID headlamps. Selecting the correct bulb requires confirming which headlamp system is installed on the specific vehicle.
• The high beam position on the 2005-2011 model years uses the H7 halogen bulb, while the low beam on those same years transitioned from D2S to D1S between the 2007-2008 and 2009-2011 periods respectively.