The Mercedes-Benz CL55 AMG uses an H7 bulb size for high beam headlights and a D2S bulb size for low beam headlights. The replacement chart covers 2001 through 2006 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 a single-filament halogen type operating at 12V and 55W, fitted with a PX26d base. It carries ECE certification for use in Europe and worldwide, and is also approved for use in the United States and Japan.
The D2S bulb is a high-intensity discharge (HID) xenon type rated at 85V and 35W, using a P32d-2 base. It is designed specifically for projector-type housings and requires an external ignitor to initiate the arc discharge that produces light.
The Mercedes-Benz CL55 AMG uses the H7 bulb for the high beam headlight across all model years from 2001-2006.
The low beam headlight position across the same 2001-2006 model range uses the D2S bulb, meaning the vehicle employs a mixed lighting system with halogen high beams and HID low beams.
The H7 and D2S bulbs are not interchangeable. Beyond their differing base types (PX26d versus P32d-2), the D2S operates at 85V and depends on a dedicated ignitor, while the H7 functions on a standard 12V halogen circuit.
Because the D2S is specified for projector-type housings, substituting a bulb type not designed for that housing geometry would alter light distribution and potentially create glare for oncoming traffic.