Mercedes S-Class W220 Rear Left Right Door Wiring Harness Cable A2205400407

Mercedes S W220 Rear Left Right Door Harness is a specialized electrical installation component designed for the rear left and right door areas in the S-Class W220 models. This factory harness, categorized under Doors and Door Panels, enables the restoration of correct door electrical functionality and maintains consistency with the original installation architecture in Mercedes vehicles.

Specifications and technical data

• SKU: A2205400407
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2205400407
• Substitutable numbers: A2205400407, A 220 540 04 07, AS
• Location on the vehicle: Rear, Right, Left
• Category: Doors & Door Skins

Vehicle Application and Placement

The presented harness is designed for installation in the rear part of the vehicle body, on both the left and right sides, within the passenger doors. Its placement on the vehicle is factory-matched to the geometry of the S-Class W220 doors, facilitating wire routing through original grommets and mounting points. This ensures proper cable management, minimizes stress, and reduces the risk of insulation abrasion during vehicle operation.

Technical Characteristics of the Door Harness

The door harness is part of the components responsible for distributing power and control signals within the rear doors. It includes wires intended for operating typical door-mounted consumers, such as control modules, actuators, and signaling elements, in accordance with the factory configuration of the S-Class W220 electrical system. The connectors used are structurally matched to the original sockets in the doors and body, allowing for installation without the need for modifications to the existing wiring.

The wire layout within the harness is optimized for operation in the moving area of the door hinges, where wires are subjected to repeated bending. Proper routing and factory mounting points contribute to stable system operation and reduce the risk of mechanical damage during daily vehicle use.

Application in Door and Body Systems

As a component within the Doors and Door Panels category, the harness serves as a link between the vehicle's main electrical system and the rear door equipment. A correctly selected harness is crucial for:

• repairs following mechanical damage to doors or grommets,
• diagnosing and resolving electrical faults in the rear of the vehicle body,
• restoring the original installation configuration after previous unprofessional modifications.

Using an original harness design ensures compliance with factory electrical diagrams, which simplifies subsequent diagnostics and integration with the vehicle's onboard systems.

Condition, Origin, and Benefits of Use

The offered door harness is a used part obtained from dismantling, providing a cost-effective solution for users seeking factory-specification parts at a reasonable price. Utilizing an original Mercedes component ensures material consistency, correct connector types, and compatibility with the electrical system of the specific S-Class generation.

Choosing such a harness is particularly recommended when maintaining the original installation architecture is a priority, eliminating the need for adapting universal wires or interfering with factory schematics. This is a practical solution for workshops specializing in the Mercedes brand and for users who service their vehicles independently.

Complementary Parts and Maintenance Tips

If you are planning a comprehensive repair or upgrade of the rear door area in your Mercedes and require other parts from the same category, such as panels, reinforcements, or mounting elements, check the available parts in the Mercedes Doors and Door Panels category.

To maximize the potential of used parts and minimize the risk of future failures, it is advisable to follow proper installation procedures, protect connectors from moisture, and periodically inspect the condition of door grommets. Practical tips for maintaining and operating used components can be found in the article How to Extend the Lifespan of Used Car Parts?, which discusses, among other things, issues related to electrical systems and dismantled components.