Mercedes W164 Front Left Right N/O/S Door Wiring Loom Harness A2514402009

Mercedes-Benz M‑Class ML W164 Front Door Wiring Harness Left/Right is an original part from the Cables, Wiring Harnesses, and Connectors category, designed to service the electrical system in the front driver or passenger door. A used, factory wiring harness ensures proper signal and power routing to door components, maintaining compliance with the vehicle's original electrical architecture.

Specifications and technical data

• SKU: A2514402009
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2514402009
• Substitutable numbers: A2514402009, A 251 440 20 09, KZ
• Location on the vehicle: Front, Left, Right
• Part type: Wire Harness
• Category: Wiring Harnesses, Cables & Connectors

Vehicle Application and Function

The presented door wiring harness for Mercedes-Benz M‑Class ML W164 is designed for installation in the front of the body, on both the left and right sides. It is responsible for connecting electrical modules and receivers within the door to the vehicle's main wiring system, enabling the correct operation of elements such as window controls, locks, and mirrors, in accordance with the manufacturer's original specifications.

Thanks to dedicated wire routing and matched connectors, the harness minimizes the risk of interference, insulation abrasion, and communication errors in electronic systems. Using an original component preserves the integrity of the electrical installation, which is particularly important in premium vehicles like the Mercedes M‑Class.

Construction and Mounting Fitment

This wiring harness belongs to the Cables, Wiring Harnesses, and Connectors group, meaning it has been factory-prepared to operate in the demanding environment of a front door – accounting for hinge movement, temperature fluctuations, and humidity. The connectors used are profiled for the specific ML W164 body model, facilitating installation and reducing the possibility of connection errors.

Its placement on the vehicle covers the front left and right sides, with the harness appropriately shaped for routing within the door and pillar structure. The correct wire length, mounting point placement, and connector shape support a plug-and-play installation, without the need for wiring modifications.

Benefits of Using an Original Mercedes Harness

Using an original door wiring harness in the Mercedes-Benz M‑Class ML W164 offers a range of practical technical benefits:

• maintaining compliance with the vehicle's original electrical schematic,
• secure connection of modules and door hardware,
• reducing the risk of malfunctions resulting from unprofessional wiring modifications,
• easier diagnosis of potential electrical issues in the future.

For workshops and individual users, this translates to stable operation of comfort systems and a lower risk of electronic system errors, which is important for both safety and driving comfort.

Part Condition and Service Application

The offered wiring harness is a used original part, sourced from disassembly, allowing for economical electrical system repair while maintaining factory-quality standards. This type of component is particularly suitable for situations where wires in the door grommet have been damaged, contacts have corroded, or previous unprofessional wiring repairs have been made.

Replacing the complete door wiring harness is often a faster and more predictable solution than spot soldering or fabricating wire sections, as it restores the original wiring path and factory mechanical protections.

More Products and Technical Knowledge

If you need other parts from the Cables, Wiring Harnesses, and Connectors group dedicated to this brand's vehicles, check the available parts in the Mercedes Cables, Wiring Harnesses, and Connectors category.

When working with electrical systems and safety systems, it's beneficial to know best practices for selecting used parts – an article describing how to responsibly choose components for key systems, such as the guide to selecting used brake system components, which illustrates universal principles for assessing the technical condition of second-hand parts, may be helpful.