Mercedes W164 Wiring Loom Cable Harness Door Rear Left Right A1644407110

Mercedes W164 Left Rear Door Wiring Harness Right Rear is an original electrical installation component designed for the rear part of the body, on the left and right sides. This factory harness from the Wires, Harnesses, and Connectors group enables proper electrical connection of the rear doors to the vehicle's electrical system, ensuring stable operation of controllers, actuators, and other components within the doors. A used component allows for a technically correct repair without the need for a costly purchase of a new part.

Specifications and technical data

• SKU: A1644407110
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1644407110
• Substitutable numbers: A1644407110, A 164 440 71 10, BG
• Location on the vehicle: Rear, Right, Left
• Category: Wiring Harnesses, Cables & Connectors

Purpose and Function in the Vehicle

The presented wiring harness is dedicated to the rear part of the vehicle, covering both the left and right sides. It is responsible for transmitting signals and power between the body and the rear doors, which is crucial for the operation of elements such as:

• electric window and lock controls,
• door illumination and auxiliary lighting,
• sensors and modules located in the door panels,
• any additional comfort features provided in the specific vehicle configuration.

Thanks to its factory design, the harness maintains the correct wire routing, appropriate wire gauges, and connectors matched to the installation in the Mercedes W164 model.

Construction and Advantages of the Original Harness

The original rear door wiring harness was designed by the vehicle manufacturer, taking into account the mechanical and electrical loads present in the hinge area and the grommets between the body and the doors. The connectors used are compatible with factory sockets, which facilitates installation and reduces the risk of installation errors.

The main benefits of using the original harness include:

• precise fit to factory mounting points,
• maintenance of correct wire routing in grommets,
• compatibility with the vehicle's existing electrical system,
• reduced risk of communication problems between modules.

This solution is particularly beneficial for repairs after mechanical damage, wire corrosion, or electrical system tampering, where restoring factory circuit continuity is required.

Vehicle Placement and Installation Aspects

The harness is intended for installation in the rear part of the vehicle, serving both the right and left sides. Proper wire routing in this area is important for the durability of connections, especially in the door movement zone, where the harness is subjected to repeated bending.

During installation, pay attention to:

• correct routing of the harness in the grommets between the pillar and the door,
• secure connection of all connectors to modules and actuators,
• retention of original mounting points and brackets,
• verification of door function operation after completion of work.

Using the factory harness minimizes the need for modifications and wire soldering, which translates to greater system reliability in the long term.

Product Characteristics and Service Application

As a component from the Wires, Harnesses, and Connectors group, this rear door wiring harness is suitable for both standard replacement of a damaged section of the electrical system and more extensive service work in the rear door area. A used component allows for economical restoration of the electrical system's functionality while maintaining factory specifications.

In workshop practice, the harness can be used, among other things, after:

• mechanical damage to wires in grommets,
• failures resulting from broken wires or oxidized contacts,
• unsuccessful installation modifications requiring a return to factory configuration.

If you are planning a comprehensive repair or upgrade of the rear door electrical installation area in your Mercedes and need other components from the same group, such as additional harnesses, wire sections, or door connectors, check the available parts in the Mercedes Wires, Harnesses, and Connectors category.

Technical Support and Mercedes Engine Knowledge

For extensive service work on vehicles of this brand, covering both the electrical system and the powertrain, specialized knowledge about common faults and their solutions can be helpful. In the context of models equipped with the 3.0 V6 CDI engine, it is worth familiarizing yourself with material discussing the characteristics of this engine and the impact of key components on its operation – you will find it in the article Second Life for the Mercedes OM642 Engine – How Injectors and Turbo Restore Power to the 3.0 V6 CDI.