Mercedes W205 Rear Door Wiring Loom Harness Left Right N/O/S A2055401242

Mercedes W205 Rear Door Wiring Loom Harness Left Right N/O/S is an original electrical installation component designed for installation on the left or right side of the rear bodywork. As part of the Cables and wiring harnesses group, it ensures a stable connection between door modules and the rest of the vehicle's installation, which translates into reliable operation of electrical equipment. This used OEM component is a practical solution for workshops and users looking for a proven, compatible part for repairing or replacing the factory installation.

Specifications and technical data

• SKU: RHD-A2055401242
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2055401242
• Substitutable numbers: A2055401242, A 205 540 12 42
• Location on the vehicle: Rear, Right, Left
• Category: Wiring & Wiring Harnesses

Application and vehicle placement

The presented harness is designed for installation in the rear part of the body, with the possibility of use on both the left and right sides. It is responsible for routing signals and power between the vehicle's main installation and components located in the rear doors, such as electric controls, lighting, or other factory receivers. Thanks to its precise fit to the electrical architecture of the W205 model, installation is carried out in an orderly manner, maintaining the original cable routing paths.

Technical characteristics and compatibility

As an original Mercedes door harness, this component has been designed for a specific body configuration and electrical installation. The connectors used, wire cross-sections, and branch layout are consistent with the manufacturer's factory standards, which facilitates plug-and-play installation without the need for modifications. The presence of dedicated mounting points and the appropriate length of cable sections allows for correct positioning of the harness in door grommets and brackets.

Benefits of using an original used harness

Choosing a used OEM harness for the Mercedes W205 allows you to maintain the consistency of the electrical installation with the vehicle's factory specifications. Original connectors and cable layout minimize the risk of compatibility issues typical of universal aftermarket replacements. For workshops and users, this means shorter installation time, fewer potential points of failure, and easier diagnostics in the future. This solution is particularly beneficial for post-accident repairs or replacing a damaged harness after mechanical interference.

Intended for professional workshops and individual users

The rear door harness in the Mercedes W205 will work well both in professional service centers and among users servicing their vehicles themselves. The clearly defined placement on the vehicle facilitates the selection of the appropriate element for a specific repair, and the design consistent with Mercedes factory standards supports maintaining the high quality of the entire electrical installation. It is a practical choice when replacing damaged wires, repairing after flooding, or restoring full functionality of door equipment.

If you are planning a comprehensive repair or upgrade of the electrical installation area in your Mercedes and need other elements from the same group, such as wires, door harnesses, or sections connecting modules, check the available parts in the Mercedes cables and wiring harnesses category.

To better plan service work and the use of used OEM elements in your car, it is worth reading the guide on the impact of parts availability on repair time – details can be found in the article Availability of car parts off the shelf vs. repair time – how do used OEM parts shorten the stay in the workshop?.