Mercedes W204 Headlight Bi-xenon Front Left N/S Plug Socket Wiring A0525455626

Mercedes W204 Headlight Bi-xenon Front Left N/S Plug Socket Wiring is a specialized component from the Front lights category, designed for installation on the driver's side. This solution is intended for users who expect precise fitment, stable lighting parameters, and compatibility with the factory Mercedes electrical installation.

Specifications and technical data

• SKU: A2048203739-2
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2048203739
• Substitutable numbers: A2048203739, A 204 820 37 39, A0525455626, A 052 545 56 26
• Location on the vehicle: Front, Left
• Category: Headlight Assemblies

Application and vehicle function

The presented bi-xenon headlight is designed for installation in the front left part of the body, ensuring proper road illumination and clear signaling for other road users. The bi-xenon design allows for both low and high beam operation within a single optical assembly, which translates into a consistent light beam distribution and good visibility in various driving conditions.

The set includes a socket and a section of wiring (plug socket wiring), which facilitates integration with the vehicle's factory electrical system. This solution reduces the need for modifications, helps maintain correct circuit resistance, and minimizes the risk of errors in lighting control systems.

Construction, connection, and compatibility

The headlight has been designed as a component that works with the factory lighting control modules in the Mercedes W204. The connectors and wiring layout used are prepared for plug-in configuration, which facilitates service installation and reduces replacement time. As a result, the part works well both for standard post-collision repairs and for replacing a worn or damaged headlight.

The presence of a dedicated socket and wiring harness promotes the maintenance of proper communication with the vehicle's installation, including systems monitoring light operation. To maintain full functionality, installation by a workshop with experience in bi-xenon systems in Mercedes vehicles is recommended.

Condition, verification, and benefits of choosing a used part

The offered headlight is a used component, which allows for a significant reduction in repair costs compared to purchasing a new part, while maintaining the original design specifications. Parts of this type are frequently chosen by professional body and paint shops as well as by conscious users who expect factory fitment without excessive budget strain.

Before installation, a standard inspection of the external lens condition, mounting points, and electrical connectors is recommended, and after installation – adjustment of the headlight setting on a diagnostic device. This allows for obtaining the correct light cut-off line and avoiding blinding other drivers.

Why choose this bi-xenon headlight

• Original design for Mercedes W204 – maintaining factory light beam geometry and compatibility with the vehicle's installation.
• Built-in socket and wiring harness – simplified installation and lower risk of connection errors.
• Bi-xenon configuration – efficient use of the light source for low and high beams.
• Economic solution – a used part allows for reduced repair costs while maintaining high functionality.

Expanding Mercedes lighting upgrades

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 additional headlights, control modules, or complete lamp assemblies, check the available parts in the Mercedes Front lights category.

For drivers interested in a broader approach to maintenance and reducing service costs while maintaining vehicle efficiency, a guide on the impact of temperature on car components may be helpful – you can find it in the article Summer heat vs. cooling system: used radiators and fans as a guarantee of savings, which shows how to consciously use the used parts market.