Door Wiring Mercedes V177 Rear Door Right Left N/O/S Harness Wire A1775405101

Door Wiring Mercedes V177 Rear Door Right Left N/O/S Harness Wire is an original electrical installation component designed for the rear body section, specifically engineered for Mercedes vehicles. The harness supports the rear door area on either the left or right side, ensuring a stable connection between the body modules and the door equipment. It is a practical solution for workshops and users who require a proven, factory-standard wiring configuration.

Specifications and technical data

• SKU: A1775405101
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1775405101
• Substitutable numbers: A1775405101, A 177 540 51 01
• Location on the vehicle: Rear, Right, Left
• Category: Other Starters, Alternators, ECUs & Wiring

Purpose and vehicle placement

The presented wiring harness is dedicated to installation in the rear part of the vehicle, within the left or right door area. It is responsible for routing signals and power between the body installation and components located in the door, such as actuators, switches, or lighting. Thanks to its factory-fit design for the Mercedes V177 body, the harness allows for proper wire routing and correct placement of connectors in grommets and mounts.

Construction and function of the wiring harness

The door harness is designed as a complete set of wires with appropriately selected connectors, which facilitates installation and reduces the risk of errors during installation repairs. The connectors used are prepared for compatibility with factory modules and door equipment, which helps maintain the full functionality of electrical systems in the rear of the vehicle. The harness construction accounts for typical mounting points in the door and pillar, which aids in proper wire routing and minimizes stress during door opening and closing.

Application in repairs and diagnostics

This component is particularly useful in situations where the installation has been damaged due to wire abrasion, contact corrosion, or post-accident repairs in the rear door area. Using an original harness allows for restoring proper communication between body modules and door equipment without the need for makeshift connections. This solution facilitates electrical diagnostics, as the layout of wires and connectors remains consistent with the manufacturer's service documentation, which is essential when working with diagnostic testers.

Benefits of choosing an original Mercedes harness

Choosing a factory wiring harness for the rear body section of the V177 model means better fitment to the door structure and compatibility with the existing vehicle installation. Original connectors and wire layout promote stable operation of electrical systems, reducing the risk of module communication issues or signal interference. For workshops, this means more efficient installation, and for the user – greater reliability of electrical systems in the rear doors.

Support for installation expansion and repairs

If you are planning a comprehensive repair or upgrade of the rear body zone in your Mercedes and need other elements from the same group, such as additional harnesses, connectors, or auxiliary modules, check the available parts in the Other Mercedes category.

For a better understanding of the structural differences between individual model lines and the impact of powertrains and chassis on the selection of electrical components, it is worth reading the article Audi RS vs other models – what is hidden under the hood and chassis?, which discusses the relationships between technical specifications and part selection in high-performance cars.

If the wiring harness is part of a wider body repair after a collision or bodywork intervention, the guide on working with dismantled parts may also be helpful, available in the article Bodywork and chassis – post-accident repairs using dismantled parts, where practical procedures and best practices for selecting used OEM components are described.