Mercedes S212 Estate Rear Light Right O/S Tail Harness Plug Loom A2128204064

Mercedes S212 Estate Rear Light Right O/S Tail Harness Plug Loom is an original electrical system component designed to support the right rear lighting in Mercedes E-Class W212 generation models. Thanks to its factory design, it ensures a secure electrical connection, stable lamp operation, and compatibility with the vehicle's factory wiring harness, which facilitates service and diagnostics.

Specifications and technical data

• SKU: A2128204064-2
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2128204064
• Substitutable numbers: A2128204064, A 212 820 40 64
• Location on the vehicle: Rear, Right
• Part type: Rear Light Assembly
• Category: Rear Light Assemblies

Purpose and function in the lighting system

The described harness with plug is a component of the Rear lights and brake lights system in the Mercedes W212, mounted on the rear right side of the vehicle. It is responsible for transmitting electrical signals to the lamp, including power for position lights, brake lights, turn signals, or license plate lighting (depending on the lamp configuration), ensuring the correct operation of all lighting functions intended by the manufacturer.

The placement on the rear right side of the body allows for precise alignment with factory mounting points and cable routing, which reduces the risk of insulation wear, loose connections, and lighting malfunctions.

Construction and fitment for Mercedes W212

The plug with cable has been designed specifically for the electrical architecture of the Mercedes W212, ensuring full compatibility with the original rear lamp and the vehicle's control modules. The connector shape, pin layout, and cable length are adapted to factory requirements, allowing for installation without modifying the wiring.

The original connector minimizes the risk of contact overheating, oxidation, and accidental disconnection during operation. This is particularly important in the rear area, which is exposed to moisture, temperature fluctuations, and body vibrations.

Service application and benefits of installation

The Mercedes S212 Estate Rear Light Right O/S Tail Harness Plug Loom is particularly useful in situations where:

• the factory plug has been damaged (cracked housing, broken latches, melted contacts),
• the cable has been cut, frayed, or corroded due to lamp leaks or mechanical interference,
• a professional repair of the wiring is necessary following a rear-end collision.

Using the original harness with the plug allows for the restoration of stable rear lighting operation without the need for universal connectors or soldering wires, which improves reliability and facilitates potential future repairs.

Product characteristics and condition

The offered item comes from the Mercedes brand and is part of the vehicle's original electrical system. The product is in used condition, meaning it was previously operated in a vehicle but retains functionality that allows for further use after proper installation. This type of solution is cost-effective while maintaining consistency with the factory installation.

By maintaining the original geometry of the connector and cable, the installation is carried out in an orderly manner, preserving factory wiring routes, which is important for both safety and subsequent service maintenance.

Installation recommendations and part selection

When replacing the plug with the cable, it is recommended that the work be performed by a person with experience in electrical systems in Mercedes vehicles. Proper wire connection, insulation protection, and correct securing of the harness in factory brackets reduce the risk of subsequent faults, such as lighting errors on the dashboard or unstable lamp operation.

Before installation, it is worth verifying the compatibility of the component with the specific body and lamp version of your W212 using the OEM part number and interchangeable numbers visible in the product's technical specification. This will help avoid fitment issues and ensure correct cooperation with the vehicle's electronics.

If you are planning a comprehensive repair or upgrade of the rear lighting zone in your Mercedes and need other elements from the same group, such as harnesses, sockets, or complete lamp modules, check the available parts in the Mercedes rear lights and brake lights category.

To better plan your purchases and efficiently complete all necessary installation elements, it is worth reading the guide on choosing used components – you will find practical tips in the article Comprehensive supply: from the engine to the smallest clip – how to complete used car parts in one place?.