Mercedes W204 Front Door Wiring Loom Harness Left N/S A2045401710

Mercedes W204 Front Door Wiring Loom Harness Left N/S is an original electrical installation component designed for installation in the front left door of Mercedes W204 class vehicles. This factory-made wiring harness from the Wires, harnesses and connectors group enables the correct connection of all receivers and sensors in the door to the vehicle's body installation, ensuring stable operation of comfort and safety systems. Thanks to its design tailored to the specific model, it provides a practical solution for post-collision repairs, door replacement, or installation damage.

Specifications and technical data

• SKU: A2045401710
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2045401710
• Substitutable numbers: A2045401710, A 204 540 17 10
• Location on the vehicle: Front, Left
• Category: Wiring Harnesses, Cables & Connectors

Purpose and vehicle placement

The presented wiring harness is intended for installation in the front left door area of the Mercedes W204 body. It is responsible for routing signals and power between the door and the rest of the vehicle's electrical system, in accordance with the factory wire routing and mounting points. Such a fit reduces the risk of chafing, short circuits, and problems with the operation of electrical components in the door.

Function and role in the electrical system

The door wiring harness in this model acts as a conductor for many circuits responsible for comfort and safety. A correctly selected component:

• ensures a stable connection between control modules and door equipment,
• facilitates electrical system diagnostics by maintaining the factory wiring layout,
• reduces the need for installation modifications during door replacement or bodywork repairs,
• helps restore the proper operation of equipment after mechanical damage or wire corrosion.

By using an original wiring harness from the Wires, harnesses and connectors group, compatibility with factory connectors and mounting points in the door and body pillar is maintained.

Product characteristics and advantages of use

The offered wiring harness is a dismantled part, which allows for maintaining the original wire routing geometry and compliance with the vehicle's installation. In practice, this means:

• easier installation thanks to factory wire lengths and terminations,
• preservation of the original electrical connection standard,
• the possibility of economical installation repair without the need to build a harness from scratch,
• reduction of the risk of assembly errors typical for universal solutions.

Choosing a used, original wiring harness is particularly beneficial for vehicle repairs where consistency of the installation with the rest of the electronic systems is important.

Application in service and repairs

The door wiring harness for Mercedes W204 will prove useful both in professional service centers and in workshops specializing in post-collision repairs and automotive electrics. It is useful, among others, for:

• replacing complete doors after a collision or corrosion,
• troubleshooting faults related to wire breakage or short circuits in the door grommet,
• restoring the efficiency of electrical systems after improper installation modifications,
• comprehensive renovation of the installation in the driver's door zone.

By using an original wiring harness, you can effectively recreate the factory installation path, which facilitates subsequent diagnostics and vehicle servicing.

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

When choosing electrical installation components from dismantling, it is worth considering different repair strategies and comparing them with component regeneration – you will find more practical tips in the article Refurbished or used original – which part to choose for repair?.