Mercedes W204 Door Harness Loom Cable Wiring Rear Right O/S A2044406135

Mercedes W204 Door Harness Loom Cable Wiring Rear Right O/S is an original electrical installation component designed for the rear right door of W204 series models. This specialized harness from the Wires, harnesses and connectors category ensures a stable connection between body modules and door equipment, such as locks, window regulators, or lighting. Thanks to its factory-fit design for the Mercedes body structure, the installation process is orderly and predictable.

Specifications and technical data

• SKU: A2044406135
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2044406135
• Substitutable numbers: A2044406135, A 204 440 61 35, KD
• Location on the vehicle: Rear, Right
• Category: Wiring Harnesses, Cables & Connectors

Purpose and fitment for Mercedes W204

The presented harness has been designed with the electrical architecture of the Mercedes W204 in mind, taking into account the specific routing of wires in the rear right door. Properly selected segment lengths, connector placement, and geometry allow for secure installation at factory mounting points, without tension or unnatural wire bending. Such a fit reduces the risk of insulation abrasion and interference in the operation of electronically controlled components.

Function in the rear door electrical system

The harness acts as a conductive link between the main body wiring and the components located in the rear right door. In practice, this means handling control and power signals for components such as:

• mechanisms responsible for central door locking,
• side window control systems,
• door lighting elements, if present in the vehicle's specific configuration,
• sensors and switches related to door position.

By maintaining the original wiring topology, the communication system between control modules and door equipment operates stably, which translates into predictable performance of comfort and safety functions.

Benefits of using an original Mercedes harness

Using a factory harness in the rear right door of a W204 allows you to avoid problems typical of universal or aftermarket solutions. Key advantages include:

• Full compatibility with the vehicle's installation – connectors are prepared to work with factory modules and equipment, with no modifications required.
• Predictable installation – the harness is routed according to factory paths, which facilitates service and subsequent diagnostics of any potential faults.
• Stability of electrical connections – properly selected wire cross-sections and connector design promote the maintenance of appropriate electrical parameters over a long service life.

For users and service centers, this means a lower risk of malfunctions in the central locking, power windows, or lighting in the rear right door.

Characteristics of the used product

The offered harness is a used item, sourced from a dismantled Mercedes vehicle. Such components are a popular choice for door wiring repairs when wires in the grommet or inside the door panel have been damaged. In practice, this allows for the restoration of full electrical system functionality while maintaining a favorable cost-to-quality ratio, all while preserving the original installation design.

This type of harness is particularly suitable in situations where the existing installation has suffered mechanical damage (breakage, abrasion, contact corrosion) and it is necessary to replace the complete section serving the rear right door.

Support with selection and additional information

Before purchasing, it is worth verifying the configuration of your W204 to select a harness that matches the equipment of your specific rear right door (e.g., presence of power windows or additional comfort features). If in doubt, it is helpful to compare the connector layout and wire segment lengths with the installation currently mounted in the vehicle.

If you are planning a comprehensive repair or upgrade of the door area in your Mercedes and need other elements from the same group, such as door wiring sections, grommet harnesses, or service connectors, check out the available parts in the Mercedes wires, harnesses and connectors category.

If you are considering broader use of aftermarket components and want to better understand how to safely choose used parts, the guide article Used parts – Your guide to the best deals in the automotive store will be helpful, where you will find practical tips on purchasing and operating such components.