The Mercedes-Benz GL63 AMG uses D1S and H7 bulb sizes for both high beam and low beam headlight applications. The replacement chart covers 2013 to 2016 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 Mercedes-Benz GL63 AMG carries two distinct headlight system configurations across the 2013-2016 model years: HID (High Intensity Discharge) and halogen capsule. Each system uses a different bulb type for both high and low beam positions, making headlight system identification a necessary step before selecting a replacement bulb.
The D1S is an HID xenon discharge bulb operating at 85V and 35W. It features a PK32d-2 base with an integral ignitor built directly into the bulb unit, and it is designed specifically for projector-type housings. It conforms to ECE standards, giving it approval for use in Europe and worldwide markets.
The H7 is a single-filament halogen bulb operating at 12V and 55W with a PX26d base. It also meets ECE standards and carries additional approval for use in the United States and Japan, reflecting broader international regulatory acceptance than the D1S.
Both the D1S and H7 serve as the designated bulb size for both the high beam and low beam positions on the GL63 AMG, meaning the same bulb type is used across both beam functions within a given headlight system configuration.
The D1S integral ignitor distinguishes it from other HID bulb formats that require a separate external ignitor component. Substituting a bulb without an integrated ignitor into a system designed for the D1S would represent a fitment incompatibility.
The PK32d-2 base of the D1S and the PX26d base of the H7 are physically distinct and non-interchangeable. These differing base types reflect the fundamental electrical and mechanical incompatibility between HID and halogen headlight systems on this vehicle.
The halogen H7 operates at 12V, consistent with standard automotive electrical systems, while the D1S operates at 85V, a voltage level generated by the HID ballast rather than drawn directly from the vehicle battery. Mixing components between these two systems is not electrically compatible.
Because the GL63 AMG was produced with either HID or halogen headlamp assemblies across the same model years, the headlight system type present on a specific vehicle determines which bulb applies, and the two bulb types are not interchangeable between system configurations.