Mercedes W177 W247 Door Wiring Rear Left Right Cable Harness A1775405801

Mercedes W177 W247 Rear Door Wiring Harness Left Right is an original part from the Wires, Harnesses, and Connectors category, designed to service the electrical system in the vehicle's rear doors. Thanks to its factory design for the Mercedes brand, it ensures proper signal and power routing to the components located in the left and right rear doors.

Specifications and technical data

• SKU: A1775405801
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1775405801
• Substitutable numbers: A1775405801, A 177 540 58 01
• Location on the vehicle: Rear, Right, Left
• Category: Wiring Harnesses, Cables & Connectors

Purpose and Vehicle Placement

The harness is designed for installation in the left and right rear doors, routed through the rear of the body. This placement allows for correct connection of the doors to the vehicle's main electrical system, minimizing the risk of wire damage during door opening and closing.

Thanks to its dedicated wiring path and matched connectors, this component supports the stable operation of the door's electrical functions, such as lock control, lighting, or other factory-intended receivers for the specific model.

Advantages of Using an Original Mercedes Harness

Using an original wiring harness in the rear of the vehicle offers a number of practical installation and operational benefits:

• factory connectors matched to the Mercedes installation, eliminating the need for electrical system modifications,
• appropriately selected length and geometry of wires for the left and right rear doors,
• manufacturer-intended mounting points, reducing wire chafing and stress,
• consistency with the vehicle's original electrical architecture.

A component configured this way facilitates servicing, reduces the risk of installation errors, and helps maintain stable operating parameters for the electrical systems in the rear of the body.

Product Characteristics and Condition

The offered harness belongs to the Wires, Harnesses, and Connectors group, meaning it is responsible for transmitting power and control signals between vehicle modules and the rear door equipment. The product is used, which in practice means it comes from a dismantled vehicle and has been verified for its suitability for further use.

For vehicles where wires in door grommets have been damaged, contacts have corroded, or the wiring has been mechanically broken, such a harness provides a functional solution to restore the correct operation of electrical systems without the need to build the installation from scratch.

Professional Use in Service and Repairs

In workshops specializing in the Mercedes brand, using a complete rear door harness significantly speeds up the repair process. Instead of time-consuming soldering of individual wires, a technician can replace the entire section of the wiring, maintaining the factory routing and connector placement. This solution is particularly beneficial for:

• repairs after collisions involving the rear doors or the rear of the body,
• wire damage in door grommets caused by years of operation,
• electrical communication problems between modules and rear door equipment.

By maintaining the original harness design, the number of potential failure points can be reduced, and future electrical system diagnostics can be simplified.

Related Products and Additional Information

If, during the modernization or repair of your Mercedes' electrical system, you also need other components from the wires, harnesses, and connectors group dedicated to this brand, check the available parts in the Mercedes Wires, Harnesses, and Connectors category.

When planning more extensive electrical system work and considering used components, it is worth familiarizing yourself with practical tips for selecting parts from the secondary market, which are described in the article Volkswagen – Solidity and Reliability. Why Used VW Parts Are a Sensible Choice?, containing universal information also useful when working with other brands.