Door Wiring Mercedes W177 W247 Front Left Right N/O/S Cable Harness A1775405601

The Mercedes W177 / W247 Front Left/Right Door Harness is an original door wiring component designed for precise connection of modules, switches, and receivers in the front section of the vehicle. This used, fully functional door wiring harness allows for professional repair or replacement of damaged wiring without the need to alter the car's factory electrical architecture.

Specifications and technical data

• SKU: A1775405601
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1775405601
• Substitutable numbers: A1775405601, A 177 540 56 01
• Location on the vehicle: Front, Left, Right
• Category: Wiring Harnesses, Cables & Connectors

Vehicle Application and Placement

The presented harness belongs to the Wires, Harnesses, and Connectors group and is designed for installation in the front left or right door. It ensures a stable electrical connection between the door and the rest of the vehicle's wiring, which is crucial for the proper operation of control elements, lighting, and other receivers located in the door.

Its placement in the front section allows it to be used on both the driver's and passenger's sides, simplifying part selection for repairs involving damage to the wiring in the door hinge area or within the door panel.

Door Harness Construction and Technical Function

The door harness is constructed as a complete, factory-original door wiring loom, equipped with appropriately selected connectors and wires of the correct cross-section and insulation. Using an original Mercedes solution promotes compatibility with factory control modules and minimizes the risk of communication errors within the vehicle's electrical network.

Key functional features of this harness include:

• dedicated connectors matched to the door wiring of the specific model,
• wires routed in a way that minimizes the risk of abrasion during repeated door opening and closing,
• preservation of factory length and cable routing geometry.

This ensures an organized installation process, and integration with the original electrical system does not require modifications or soldering of additional wire sections.

Benefits of Using an Original Mercedes Harness

Using an original door harness in Mercedes W177 and W247 models helps maintain the integrity of the entire electrical system. Proper shielding and wire cross-section selection contribute to stable control system operation and reduce the risk of interference. This is particularly important in modern vehicles where many door functions are integrated with comfort and safety systems.

The main advantages of the product include:

• factory fitment for the specific vehicle platform,
• the ability to replicate the original wiring path within the door,
• reduced diagnostic and installation time due to the ready-made connector configuration.

Choosing an original harness from the Wires, Harnesses, and Connectors group is particularly beneficial for repairs after collisions, mechanical damage to door grommets, or module communication issues within the door.

Product Condition and Service Application

The offered door harness is a used part, which in service practice often represents a sensible compromise between repair cost and maintaining original quality. This type of solution is frequently chosen by professional workshops specializing in the Mercedes brand, where compliance with factory specifications and the ability to quickly replace a damaged wiring section are paramount.

The harness is suitable for both typical maintenance repairs and more extensive work involving door replacement, wiring reconstruction after damage, or restoring full electrical functionality after bodywork interventions.

Expanding Door Wiring in Mercedes Vehicles

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

If you want to learn more about selecting used electrical system components and other parts for popular car models, our guide – Best Used Car Parts – A Guide to the Most Frequently Chosen Original Parts – may be helpful. It discusses practical selection criteria and technical aspects related to installation.