Mercedes-Benz W203 CL203 C209 Headlight Switch Unit Button Black A2035451204

Mercedes-Benz W203 CL203 C209 Headlight Switch Unit Button is an original component from the Switches, control elements and ignition locks group, designed to control the vehicle's exterior lighting. The black, subdued color scheme harmoniously blends into the dashboard, maintaining the consistent interior look characteristic of the Mercedes brand.

Specifications and technical data

• SKU: rhd-A2035451204-1
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2035451204
• Substitutable numbers: A2035451204, A 203 545 12 04, ŁS
• Color: Black
• Category: Switches & Controls

Application and function in the lighting control system

This headlight switch is the central control element for the lighting system in Mercedes C-Class W203 generation models, as well as CL203 and C209 bodies. It is responsible for precise selection of lighting modes, providing the driver with convenient access to key functions without distracting them from the road. The module's design is adapted to the factory electrical system, ensuring full compatibility with the vehicle's wiring.

Design, ergonomics and color

The black housing has been designed to visually integrate with the cockpit panel without appearing as an "aftermarket" element. The shape and tactile resistance of the buttons and knobs are optimized for ergonomics, facilitating intuitive operation even when wearing gloves. The layout of functions on the panel is consistent with Mercedes' factory logic, which preserves the driver's habits and reduces the risk of errors while driving at night.

Benefits of using an original headlight switch

Choosing an original headlight switch for your Mercedes translates into a number of practical benefits:

• Full integration with the electrical system – the module works with factory safety features and lighting control.
• Visual consistency with the dashboard – the black finish matches the original interior panels.
• Ergonomic operation – logical layout of functions and tactile switching positions.
• Stable mounting in the panel – design intended for the factory mounting slot.

As a result, replacing a damaged or worn component with an original headlight switch allows you to restore the proper operation of the lighting system without the need for any modifications to the installation.

Condition, fitment and part identification

The item comes from a Mercedes vehicle and is classified in the Switches, control elements and ignition locks group. As a used part, it retains its factory geometry and mounting points, which facilitates installation in place of the old module. Identification is based on the OEM part number and interchangeable numbers recorded in the technical specification, which allows for verifying compatibility with the specific equipment version of a given W203, CL203, or C209 unit.

How to safely select used electrical components

When selecting a used headlight switch, it is worth paying attention to the part number compatibility, body type, and vehicle year to avoid problems with installation or communication with the electrical system. It is also good practice to check the condition of connectors and sockets to ensure stable electrical contact after installation. If you want to learn more about the general rules for safely choosing used components, including braking system elements, the following article will be helpful: Second-hand braking system: how to safely choose discs, calipers, and ABS?.

Related control elements for Mercedes

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 locks, check out the available parts in the Mercedes switches, control elements and ignition locks category.