Mercedes-Benz High Intensity Discharge (HID) Headlight Control Module - Genuine Mercedes 222870078980

Product Information

A High Intensity Discharge (HID) headlight control module (often called a ballast or igniter) is the electronic unit that regulates the voltage and current needed to operate HID headlights. Since HID bulbs require a high-voltage surge to ignite and then a steady lower voltage to maintain illumination, the module manages this process for reliable and stable light output. Without it, the HID bulb cannot function properly. Over time, heat, moisture, and electrical stress can cause the module to fail.

• Headlight not turning on – HID bulb fails to ignite even though other lights work.
• Flickering or intermittent light – bulb turns on and off or flashes while driving.
• Dim or uneven brightness – reduced light output compared to the other headlight, even with a good bulb.

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The original parts used by Mercedes Benz to build your car are available as replacement parts under the “Genuine Mercedes Benz” brand. Manufactured under the direction of Mercedes Benz, expect excellent quality and a premium price since these parts are exclusively available through the Mercedes Benz Dealership network.

You may not realize this, but the parts that make up your Mercedes-Benz are not necessarily manufactured by Mercedes-Benz. No cause for concern, as Mercedes-Benz designs the part, hires a manufacturer, and ensures its quality to you. In fact, many of these manufacturers have been making parts for Mercedes-Benz for decades. In our industry these manufacturers are called OEM (Original Equipment Manufacturers), and these are often brands you recognize, including Lemforder, ZF, Sachs, Bosch, Valeo, Zimmermann, Siemens VDO, Corteco, and more. Don’t be surprised to open that Genuine Mercedes-Benz parts box and find an OEM branded part inside, simply with the addition of a Mercedes-Benz logo.

Be sure to keep an eye out for OE tags on our product pages to quickly identify parts coming direct from OE manufacturers. That extra bit of insight could save you some serious money while shopping! Refer to our OE Academy for further information regarding the OE/OEM tags throughout the site.