Mercedes-Benz CL600 Headlight Bulb Size

Additional Notes

• The H7 bulb is the high beam specification for the Mercedes-Benz CL600 across the 1998-2002 and 2001-2010 model years, making it the most frequently specified high beam type in these listings. It is a single-filament halogen bulb operating at 12V and 55W, fitted with a PX26d base, and carries ECE approval with additional recognition in the US and Japan.
• The H11 halogen bulb replaces the H7 as the high beam specification for the 2011-2014 CL600. Although both are single-filament halogen bulbs rated at 12V and 55W under ECE standards, they use different bases, the H7 using a PX26d base and the H11 a PGJ19-2 base, making the two types physically incompatible with each other despite their identical wattage and voltage ratings.
• All low beam positions across the full model range use HID xenon discharge bulbs rather than halogen types. The D1S, D2S, and D2R designations all operate at 85V and 35W, a substantially higher operating voltage than the 12V halogen bulbs used in the high beam positions.
• The D2S is the low beam specification for the 2001-2009 CL600 and uses a P32d-2 base designed for projector-type housings. Unlike the D1S, it does not incorporate an integral ignitor and therefore requires a separate external ignitor within the vehicle's lighting system.
• The D1S replaces the D2S as the low beam bulb for the 2010-2014 CL600. It shares the projector-housing design intent of the D2S but uses a PK32d-2 base and integrates the ignitor directly into the bulb body. Because the ignitor is built in, D1S and D2S bulbs are not interchangeable despite their identical voltage and wattage ratings.
• The 1998-1999 CL600 uses the D2R for its low beam, which differs from the D2S in that it is designed for reflector-type housings rather than projector-type housings. The D2R carries a P32d-3 base, distinguishing it physically from the D2S P32d-2 base. Both require an external ignitor and operate at 85V and 35W.
• The D2S and D2R share the same voltage, wattage, and external ignitor requirement, but their base configurations and housing compatibility differ. Substituting one for the other would result in a fitment mismatch relative to the housing type for which each is specified.
• Across all years covered, the high beam and low beam positions on the CL600 use entirely different bulb technologies, with halogen types assigned to high beam duties and HID xenon types assigned to low beam duties, reflecting a mixed-technology headlight system throughout the model's production span.