The Mercedes-Benz B250e uses D1S and H7 bulb sizes for both high beam and low beam headlight applications. The replacement chart covers 2016 to 2017 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 B250e carries two distinct headlamp system configurations across the 2016-2017 model years: a High Intensity Discharge setup and a halogen capsule setup, each requiring a different bulb type for both high and low beam positions.
The D1S is an HID (xenon) discharge bulb operating at 85V and 35W, built to the ECE standard for use in Europe and worldwide markets. It features a PK32d-2 base with an integral ignitor and is designed specifically for projector-type housings.
The H7 is a single-filament halogen bulb rated at 12V and 55W, also conforming to the ECE standard. Its PX26d base is a widely adopted fitting, and the bulb holds approval for use in the United States and Japan in addition to European and worldwide markets.
Because the D1S incorporates an ignitor as part of the bulb assembly, it is not interchangeable with standard HID bulbs that rely on a separate external ignitor unit.
The B250e headlamp system is headlamp-type dependent, meaning the correct bulb is determined by whether the vehicle was fitted with HID or halogen capsule headlamps at the time of manufacture. Both beam positions within a given headlamp system use the same bulb type.
The H7 and D1S operate on fundamentally different electrical and optical principles, and the two types are not interchangeable regardless of shared beam position designations.