Light Switch Mercedes CL203 Headlight Switch Unit Button A2035452504

Visual condition of the part 

The product shows signs of use visible in the photos. 

Light Switch Mercedes CL203 Headlight Switch Unit Button is an original component from the Switches, control elements and ignition switches group, designed to control the vehicle's exterior lighting. This factory headlight switch unit, in an elegant black finish, ensures a consistent cockpit look and precise operation of lighting functions in your Mercedes.

Specifications and technical data

• SKU: rhd-A2035452504-1
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2035452504
• Substitutable numbers: A2035452504, A 203 545 25 04, KZ
• Color: Black
• Category: Switches & Controls

Application and function in the electrical system

The described light switch is a central control element for the front and rear lighting circuits in the CL-Class CLC/CL203 series body. It is responsible for transmitting signals to the electrical system control modules, allowing for the selection of parking light, low beam, or other operating modes provided in the specific vehicle configuration. Thanks to a design consistent with factory Mercedes standards, the correct logic of the system and compatibility with the original wiring harness are maintained.

Construction, ergonomics and color scheme

The switch is finished in black, which allows for aesthetic matching with most factory Mercedes dashboards. The layout of buttons and knobs has been designed for intuitive operation – the driver has quick access to all functions without taking their eyes off the road. The materials and operating surfaces used are resistant to typical operational loads, such as frequent switching or contact with hands, which helps maintain legible pictograms and stable button travel.

Benefits of using an original Mercedes switch

Using an original light switch in a Mercedes CL203 allows you to maintain the electrical and mechanical consistency of the entire control panel. In practice, this means:

• proper cooperation with factory comfort modules and the lighting system,
• correct fit of mounts to the mounting holes in the dashboard,
• preservation of a uniform interior style thanks to matching colors and textures,
• stable operation of lighting functions without the need for system adaptation.

For the user, this means convenient lighting operation and a reduced risk of communication errors with the vehicle's electronics, which can occur when using non-original replacements.

Component condition and installation aspects

The offered light switch is a used component, which in practice means it comes from vehicle dismantling and has been previously operated. This type of part is a good choice when the existing module in the car has suffered mechanical wear (e.g., broken knob, worn contacts) or damage due to electrical system overload. The switch is installed in place of the factory control panel and requires standard removal and installation procedures within the cockpit.

Part selection and operational safety

When selecting a light switch for a specific version of the Mercedes CL203, it is crucial to verify compatibility with the vehicle's equipment and electrical system configuration. A properly selected component helps avoid problems with incorrect lighting operation, error messages on the instrument cluster, or interference with other comfort systems. In case of doubt, it is worth comparing the panel design and connector layout with the part currently installed in the car.

If you are planning a comprehensive repair or upgrade of the lighting control zone in your Mercedes and need other components from the same group, such as button panels, control modules, or additional switches, check the available parts in the Mercedes switches, control elements and ignition switches category.

For drivers who are simultaneously servicing the braking system and want to consciously choose used components, a useful supplement to your knowledge will be the guide article Second-hand braking system: how to safely select discs, calipers and ABS?, which discusses practical criteria for assessing the condition of parts from the secondary market.