The Mercedes-Benz GLK250 high beam headlight uses D1S or H15 bulb sizes, while low beam headlight applications require D1S or H7 bulb sizes. The replacement chart covers 2013 to 2015 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 GLK250 uses two distinct headlamp systems across the 2013-2015 model years: HID (High-Intensity Discharge) and halogen capsule, with bulb selection depending entirely on which system the vehicle was built with.
The D1S is the HID bulb used in both high and low beam positions on GLK250 units equipped with HID headlamps. It operates at 85V and 35W, uses a PK32d-2 base with an integral ignitor, and is designed specifically for projector-type housings.
Because the D1S includes a built-in ignitor, it is not interchangeable with other HID bulb types that require a separate external ignitor, such as the D2S or D3S.
On halogen-equipped GLK250 vehicles, the high beam position uses the H15, a dual-filament bulb rated at 12V with a 55W main filament and a 15W secondary filament, mounted on a PGJ23t-1 base.
The low beam position on halogen GLK250 vehicles uses the H7, a single-filament bulb rated at 12V and 55W with a PX26d base. Unlike the H15, the H7 holds approval in the US and Japan in addition to ECE-standard markets.
The H15 and H7 are not interchangeable with each other. Their base types differ, PGJ23t-1 versus PX26d, and their filament configurations are fundamentally different, making physical and electrical compatibility impossible between the two.
All three bulb types, D1S, H15, and H7, conform to ECE standards, indicating they meet European and international regulatory requirements for road use.
The halogen and HID systems on the GLK250 are mutually exclusive configurations. A vehicle built with HID headlamps uses the D1S for both beam positions, while a halogen-equipped vehicle uses the H15 for high beam and the H7 for low beam, with no crossover between the two systems.