Mercedes W205 Rear Left N/S Tail Light Plug Socket Wirning A2105403681

The Left Rear Lamp Socket and Harness for Mercedes W205 is a practical, original electrical installation component designed to service the driver's side rear combination lamp. Thanks to its factory design, it ensures a secure electrical connection, stable operation of the brake light and other lamp functions, as well as easy integration with the factory wiring harness in the body.

Specifications and technical data

• SKU: A2059066300-2
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2059066300
• Substitutable numbers: A2059066300, A 205 906 63 00
• Location on the vehicle: Rear, Left
• Category: Centre & Third Brake Light Assemblies

Purpose and Function in the Lighting System

The presented socket with harness is a component of the Main and Center Brake Lights system in Mercedes C-Class W205 models, installed in the left rear lamp of the vehicle. It is responsible for the stable connection of bulbs or lighting modules to the car's electrical system, which translates to the correct operation of the brake light, position light, and turn signal in that lamp.

The placement on the vehicle, identified as the rear – left side, allows for unambiguous identification of the component during diagnostics or planning of lighting system repairs. This makes it easier to select the correct part and avoid compatibility issues.

Construction, Compatibility, and Installation

The left rear lamp socket for the Mercedes W205 has been designed as part of the OEM installation, meaning it adheres to factory manufacturing and fitment standards. The construction includes:

• dedicated connectors for the driver's side rear lamp,
• appropriately routed wiring harness,
• preservation of the correct pin order and light signals.

This configuration facilitates installation in place of the original component, without the need for wiring modifications. In practice, this involves disconnecting the old socket, installing the new one, and correctly connecting the plugs, while maintaining sealing and proper wire routing.

Benefits of Using an Original Lamp Socket

Using an original socket with harness in the Mercedes W205 offers a range of practical operational benefits:

• Stable Rear Lighting Operation – proper electrical contact minimizes the risk of flickering, brake light failure, or dashboard errors.
• Full Compatibility with Vehicle's Electrical System – the factory wiring configuration is maintained, simplifying diagnostics and servicing.
• Safe Current Load Dissipation – correctly sized wires and connectors contribute to long-term reliability.
• Restoration of lighting system functionality after mechanical damage or contact corrosion.

For users experiencing light error messages, unstable lamp operation, or signs of overheated contacts, replacing the socket with harness is often an effective and technically justified solution.

Characteristics of a Used Product

The item is offered as a used part, allowing for an economical repair of the lighting system while maintaining the original manufacturer's specifications. In practice, this means the possibility of restoring correct rear lamp operation without the need to invest in a complete new lighting set.

Choosing an original, used socket with harness is particularly beneficial for post-accident repairs, replacement of a damaged lamp, or in cases of worn wiring near the rear bumper and wheel arch.

If you are planning a comprehensive repair or upgrade of the rear lighting area in your Mercedes and need other parts from the same group, such as combination lamps, light modules, or additional wiring, check the available parts in the Main and Center Brake Lights Mercedes category.

Why Choose Used Original Mercedes Parts

For premium brands like Mercedes, using original components – even used ones – often provides better durability and compatibility than aftermarket replacements of unknown origin. This applies to lighting components as well as more advanced comfort or safety systems.

If you want to learn more about the advantages of using original salvaged parts in cars of this brand, it is worth reading the article: Used Parts for Mercedes – Original Salvaged Components, which describes practical application examples and economic aspects of such a solution.