OEM Xenon HID Headlight Ballast Control Unit – A2129007804

Bring your headlights back to life with this genuine OEM Xenon HID Ballast (Part No. A2129007804). Designed to regulate power delivery for HID bulbs, this ballast ensures instant ignition, steady brightness, and long-lasting performance — keeping your Mercedes-Benz lighting system running like new.

Manufactured to Mercedes-Benz factory specifications, this unit is a direct plug-and-play replacement, requiring no coding or programming. Its durable aluminum housing provides excellent resistance to heat, moisture, and vibration for maximum reliability and lifespan.

Features:

• Genuine OEM Replacement – A2129007804

• Designed for HID/Xenon headlight systems

• Restores full brightness and eliminates flickering

• Plug-and-play installation (no coding required)

• Aluminum alloy casing for superior durability

• Meets or exceeds OEM quality and performance standards

Compatible With (varies by model/year):

• Mercedes-Benz: E-Class (W212), CLS-Class (W218), and other models equipped with Xenon headlights
  (Please confirm part number and compatibility before purchase)

Specifications:

• Part Number: A2129007804

• Voltage: 12V

• Type: HID/Xenon Ballast Control Unit

• Material: Aluminum Alloy

• Condition: New / OEM-Quality Replacement

Common Symptoms of a Faulty Ballast:

• HID bulbs flicker or fail to ignite

• Headlight turns off after a few seconds

• Uneven or dim lighting output

Restore your vehicle’s lighting performance with the OEM Mercedes-Benz Xenon HID Ballast A2129007804 — engineered for precision, durability, and perfect factory fit.