Mercedes W221 Rear Door Wiring Loom Harness Cable Left Right N/O/S A2214407910

Mercedes W221 Wiring Harness Rear Door Left Right Installation is an original electrical component from the Wires, Harnesses, and Connectors group, designed for the rear doors on both sides of the body. It ensures a stable connection between the vehicle's wiring and the door hardware, which translates to reliable electrical operation and comfort in daily use. This solution is particularly useful for professional repair or replacement of damaged wiring in higher-class models.

Specifications and technical data

• SKU: A2214407910
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2214407910
• Substitutable numbers: A2214407910, A 221 440 79 10
• Location on the vehicle: Rear, Right, Left
• Part type: Wire Harness
• Category: Wiring Harnesses, Cables & Connectors

Vehicle Application and Placement

The presented wiring harness is designed for installation in the rear doors, intended for both the left and right sides. It is responsible for transmitting signals and power between the main body electrical system and the components located in the doors, such as control modules, actuators, or other electrical consumers. Thanks to dedicated wire routing and factory connectors, installation is orderly and consistent with the vehicle's construction.

Technical Characteristics of the Harness

This harness belongs to the Wires, Harnesses, and Connectors group, meaning it is prepared to operate in the demanding environment of a door – considering hinge movement, temperature changes, and exposure to moisture. The connectors used enable a secure connection with the factory wiring, and proper wire routing minimizes the risk of chafing and damage during repeated opening and closing of the doors. The design is intended for integration with the rear part of the body, facilitating diagnostics and service in this area.

Benefits of Using an Original Mercedes Harness

Using an original harness in a higher-class Mercedes model helps maintain the integrity of the electrical system and compliance with factory schematics. The main advantages of this solution include:

• precise fit for the rear door structure on both sides of the vehicle,
• preservation of factory wire routing and mounting points,
• compatibility with original connectors and electrical modules,
• reduced risk of electrical communication problems in the rear door area.

As a result, the harness is a practical solution for collision repairs, replacement of corroded or damaged wires, and restoring full functionality to door electronics.

Condition, Origin, and Service Application

This component is a used part obtained from disassembly, offered for economical repair while maintaining the original manufacturer's specifications. This type of harness is suitable for workshops specializing in the Mercedes brand, as well as for individual owners who want to restore door wiring functionality without using aftermarket alternatives with uncertain fit. Choosing an original component is particularly important in vehicles equipped with extensive comfort electronics.

Assistance with Part Selection and Additional Information

Before purchasing, it is advisable to compare the connector configuration and harness routing with the currently installed part in your vehicle to confirm compatibility with your specific equipment version. Vehicle identification data and service documentation can be helpful in case of doubt, facilitating the matching of the wiring to the specific unit.

If you are planning a comprehensive repair or upgrade of the door electrical system in your Mercedes and need other parts from the same group, such as additional harnesses, transition wires, or service connectors, check the available parts in the Mercedes Wires, Harnesses, and Connectors category.

When choosing between a disassembled part and refurbished electrical components, a guide article may be helpful – you can find more on this topic in the article Refurbished or Used Original – Which Part to Choose for Repair?.