Mercedes W207 Headlight Headlamp Lamp Light Plug Wiring A2218206861

Mercedes W207 Headlight Headlamp Lamp Light Plug Wiring is an original lighting system component designed for the precise connection of the passenger-side headlight. Thanks to the factory-standard connector geometry and correctly selected wire cross-section, it ensures stable power supply to the headlight and proper communication with the vehicle's electrical system, which translates into safe and predictable lighting performance.

Specifications and technical data

• SKU: A2078204461-2
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2078204461
• Substitutable numbers: A2078204461, A 207 820 44 61
• Location on the vehicle: Front, Right
• Category: Headlight Assemblies

Purpose and function in the lighting system

The presented wiring harness is a component from the Front lights group, responsible for connecting the headlight to the vehicle's main electrical system. The installation location is the front right side, meaning the component has been specifically designed to support the right headlight in the W207 body style. Properly shaped connectors and wire lengths allow for routing the installation according to the factory path, without tension or unnatural bends.

Compatibility and identification parameters

Original manufacturer markings and assignment to the specific Mercedes W207 body generation facilitate clear identification of the part and selection of the correct element for a specific vehicle. The product has dedicated catalog numbers and interchangeable numbers, which allows for verification of compatibility with the vehicle based on both factory markings and references used in parts catalogs.

Thanks to this, the wiring harness will serve as a direct replacement for the factory headlight cabling in situations of mechanical damage, connector overheating, contact corrosion, or interference with the installation during previous repairs.

Condition, functional advantages, and installation

The item is offered as a used part, which allows for an economical repair of the lighting system while maintaining the original manufacturer's specifications. The wiring retains its factory design, making the installation predictable for a mechanic – utilizing standard mounting points and wire routing. The lack of need for installation modifications minimizes the risk of assembly errors and future electrical diagnostic issues.

In practice, this means that after correctly connecting the plugs and securing the wires, the headlight regains full functionality, and the lighting control system operates based on the parameters intended by the manufacturer. This solution is particularly beneficial for post-accident repairs or when replacing a lamp with an element consistent with factory specifications.

Why choose an original Mercedes wiring harness

Compared to universal solutions, the original wiring harness for the front right headlight in the Mercedes W207 provides:

• factory-matched wire length and routing for the front compartment,
• connectors compatible with the original lamp and the vehicle's installation,
• consistency with Mercedes electrical system diagnostics,
• reduced risk of overheating or loose contacts due to proper connector design.

For the user, this means stable lighting operation, no error messages related to incorrect circuit resistance, and easier service maintenance in the future. This is particularly important in vehicles equipped with advanced lighting control systems.

Expansion and service of the Mercedes lighting system

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 complete lamps, control modules, or additional wiring harnesses, check the available parts in the Mercedes Front lights category.

For larger service or modernization projects, including the drivetrain, a practical guide regarding transmissions may be a good supplement to your knowledge – more information can be found in the article Transmission: manual, automatic, or DSG – common faults and a guide to buying a used gearbox.