Headlight Module Mercedes W205 LED Ballast Control Unit Module A2059004230

Headlight Module Mercedes W205 LED Ballast Control Unit Module is a specialized controller responsible for the precise operation of the headlights in the front of the vehicle. This component from the Front lights category ensures proper control of LED headlight functions, stabilizing the lighting system's operation and supporting driving safety after dark.

Specifications and technical data

• SKU: A2059004230-1
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2059004230
• Substitutable numbers: A2059004230, A 205 900 42 30
• Location on the vehicle: Front
• Category: Headlight Assemblies

Purpose and function of the module

The LED headlight controller in the Mercedes C-Class W205 generation plays a key role in the front lighting system. It is responsible for controlling the operation of the LEDs, the proper distribution of the light beam, and cooperation with vehicle systems, such as body electronics or sensors. As a result, the headlights maintain stable lighting parameters, which translates into clear road illumination and better vehicle visibility for other road users.

Benefits of using an original Mercedes module

Using an original Headlight Module Mercedes W205 LED Ballast Control Unit Module allows you to maintain the factory operating parameters of the lighting system. The controller is designed to work with the electrical installation of a specific vehicle generation, which reduces the risk of communication errors, flickering lights, or improper operation of the LED headlights. This solution is particularly beneficial for post-collision repairs or when replacing a damaged ballast in the headlight.

The component is mounted in the front of the vehicle, directly in the headlight zone, which shortens the signal path and improves system stability. A properly selected controller facilitates diagnostics, works with factory software, and allows for compliance with the manufacturer's lighting requirements.

Technical characteristics and installation

The Headlight Module Mercedes W205 LED Ballast Control Unit Module has been designed as an electronic component intended for operation in the headlight housing or its immediate vicinity. The design takes into account the conditions in the front of the vehicle, such as temperature changes or humidity, which promotes stable operation in daily use. The control system communicates with the vehicle's installation via dedicated connectors, which enables integration with the car's diagnostic and control systems.

When replacing, it is recommended to have the installation performed by a person with experience in automotive electronics, while following the manufacturer's procedures regarding disconnecting the power supply and any necessary system adaptation. A correctly installed module restores full functionality of the LED headlight, without the need for interference with the electrical harness or additional modifications.

Condition and practical application

The offered module is a used part, which in the case of original components for premium cars, such as Mercedes, represents a reasonable compromise between cost and quality. These types of controllers, sourced from the dismantling of functional vehicles, are frequently chosen for post-accident repairs, replacing a damaged ballast, or restoring full efficiency to the LED lighting system in the front of the car.

If you want to better understand why original used components for premium brands are becoming an increasingly popular choice, it is worth reading the article: Crisis in the new parts market? Why used originals for premium cars are the hottest trend in 2026.

Expanding the lighting system in a Mercedes

If you are planning a comprehensive repair or upgrade of the front lighting zone in your Mercedes and need other elements from the same group, such as headlights, control modules, or additional LED components, check the available parts in the Mercedes Front lights category.