Light Switch Mercedes W203 Headlight Control Unit Module Button A2035452704

Visual condition of the part

The product shows signs of use visible in the photos.

Light Switch Mercedes W203 Headlight Control Unit Module Button is a factory-fitted electrical system component responsible for operating the lights from the dashboard. This original control module ensures proper integration with the vehicle's electrical system, maintaining consistency with the factory interior equipment and operational ergonomics.

Specifications and technical data

• SKU: rhd-A2035452704
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2035452704
• Substitutable numbers: A2035452704, A 203 545 27 04, KZ
• Location on the vehicle: Front
• Color: Black
• Category: Switches & Controls

Function and application in the lighting system

The light switch in the Mercedes C-Class W203 acts as the central control element for the vehicle's exterior lighting. From a single module, the driver operates the basic light modes, and signals from the switch are transmitted to the electrical system in accordance with the factory logic of the system.

This component is mounted in the front part of the cabin, within easy reach of the driver, which facilitates intuitive operation and allows for maintaining the original cockpit layout. The black color scheme of the housing ensures visual consistency with the dashboard and other control elements.

Construction, integration, and fitment

The light switch module has been designed specifically for the W203 platform, ensuring it retains the correct mounting points and appropriate electrical connectors. This means that once matched to the specific vehicle equipment version, it can be installed in place of the factory component without the need for any wiring modifications.

Original manufacturing guarantees:

• proper fitment with the dashboard panel,
• compatibility with the vehicle's electrical harness,
• preservation of factory lighting operation ergonomics.

Condition, verification, and selection by part numbers

The offered light switch is a component from the Switches, control elements, and ignition locks category in used condition, which allows for an economical repair of the lighting system while maintaining the manufacturer's original specifications. Before installation, it is recommended to verify compatibility using the OEM part number and available interchangeable numbers to match the module to the specific vehicle equipment version and model year.

Thanks to factory markings, precise identification of the component is possible, which minimizes the risk of selecting the wrong switch variant and facilitates integration with the existing electrical system.

Benefits of using an original light switch

Using an original lighting control module in a Mercedes W203 allows for maintaining full system functionality and consistency with other vehicle systems. Key advantages include:

• factory fitment to the dashboard and electrical harness,
• preservation of original lighting operation ergonomics,
• aesthetic integration with the interior thanks to the black color scheme,
• possibility of economical lighting system repair using a used OEM component.

Such a solution is particularly beneficial for the repair of daily-driven vehicles, where both functionality and reasonable maintenance costs are important.

Expansion of the control system and knowledge about used parts

If you are planning a comprehensive repair or upgrade of the cockpit area in your Mercedes and need other elements from the same group, such as additional switches, control modules, or ignition lock components, check the available parts in the Switches, control elements, and ignition locks Mercedes category.

When selecting used control elements, it is worth knowing the specifics of the brand's original components and the benefits of using them. This topic is discussed in more detail in the article Used parts for Mercedes – original components from dismantling, which describes how to consciously choose OEM components to maintain vehicle comfort and functionality at optimal operating costs.