Mercedes W205 Head Light Lamp Socket Cable Wiring Harness Loom Plug A0525455626

Mercedes W205 Head Light Lamp Socket Cable Wiring Harness Loom Plug is an original headlight electrical system component, designed for the precise connection of bulb sockets and connectors to the vehicle's main wiring harness. Thanks to its factory design, it ensures stable electrical connections, reducing the risk of lighting errors, dashboard warning messages, and lighting malfunctions. It is a practical service solution for post-collision repairs, headlight replacement, or damage to the original wiring.

Specifications and technical data

• SKU: A2059065804-2
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2059065804
• Substitutable numbers: A2059065804, A 205 906 58 04, A0525455626, A 052 545 56 26
• Category: Wiring Harnesses, Cables & Connectors

Purpose and function in the lighting system

The presented wiring harness belongs to the Wires, harnesses, and connectors category and is dedicated to the headlight in the Mercedes C-Class W205 generation. It is responsible for supplying power and control signals to individual light points within the lamp, such as low beam, high beam, parking lights, or turn signals – depending on the specific headlight configuration of the vehicle.

Factory connectors and appropriately selected wire lengths facilitate the correct routing of the harness inside the headlight housing and its connection to the vehicle's electrical system. Using an original component allows for maintaining compliance with the electrical parameters specified by the manufacturer, which promotes stable operation of lighting control units and safety systems.

Advantages of using an original Mercedes wiring harness

Using an original wiring harness in a Mercedes W205 headlight provides a range of practical service and operational benefits:

• secure, matched connectors eliminating the need for custom adapters or soldering wires,
• preservation of the factory cable routing geometry inside the lamp,
• reduced risk of overheating or abrasion due to proper wire routing,
• better compatibility with lighting control modules and onboard diagnostics,
• easier identification and future service thanks to the original design.

For workshops and users, this means more efficient installation, a lower risk of secondary faults, and greater predictability of the lighting system's performance after repair.

Component condition and use in repairs

The offered wiring harness is a salvaged part, which in practice allows for combining an attractive price with the preservation of the manufacturer's original specifications. This type of component is particularly useful for:

• post-accident repairs involving the replacement of the headlight or its interior,
• mechanical damage to sockets and wires inside the lamp,
• problems with intermittent power supply to bulbs or LED modules,
• restoring the factory installation after previous unprofessional modifications.

Utilizing an original wiring harness from the same model family facilitates the consistency of the electrical system and limits the need for additional modifications.

Professional installation and compatibility

To fully utilize the potential of this wiring harness, installation by a person with experience in electrical systems in Mercedes vehicles is recommended. Proper routing of wires in the headlight housing, correct latching of connectors, and checking the lamp's seal after installation help avoid problems with moisture, contact corrosion, or errors in driver assistance systems.

The wiring harness has been designed to work with factory headlights of the appropriate equipment versions; therefore, before installation, it is worth verifying compatibility with the specific vehicle configuration. Maintaining the original wiring architecture promotes trouble-free operation of the lighting system in the long term.

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 harnesses, connectors, or wire sections, check the available parts in the Mercedes wires, harnesses, and connectors category.

For broader post-collision repairs involving headlights, mounts, and body parts, a practical guide describing the selection and installation of used OEM components may be helpful – you can find it in the article Bodywork and exterior – post-accident repairs using salvaged parts.