Mercedes W221 Door Wiring Cable Rear Right O/S Door Loom Harness A2215400210

Mercedes W221 right rear door wiring harness is an original electrical installation component, designed for the rear right door panel of the W221 S-Class model. It enables proper electrical connection between the door and the body, ensuring stable operation of factory receivers and modules in this area of the vehicle.

Specifications and technical data

• SKU: A2215400210
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2215400210
• Substitutable numbers: A2215400210, A 221 540 02 10
• Location on the vehicle: Rear, Right
• Part type: Wire Harness
• Category: Wiring Harnesses, Cables & Connectors

Purpose and Vehicle Placement

The presented right rear door wiring harness for Mercedes W221 has been specifically designed for installation in the rear right door. It is responsible for routing signals and power between the body's electrical system and the components located in the door, such as actuators, control units, or electrical receivers designed for this model.

The placement in the vehicle, specified as rear – right side, allows for unambiguous identification of the installation area and reduces the risk of errors when selecting the component. This ensures that the harness can be plugged into existing connectors without requiring any modifications to the installation.

Technical and Functional Characteristics

The harness belongs to the category of wires, harnesses, and connectors, meaning it is an integral part of the vehicle's factory electrical system. The wire gauges, insulation types, and connector configurations used are adapted to the loads and safety standards adopted by the manufacturer.

• Factory wire routing geometry – the appropriate length and shape of the harness facilitate its routing through grommets between the pillar and the door.
• Dedicated connectors – the harness ends are prepared to interface with original sockets in the door and body, promoting plug-and-play installation.
• Compatibility with vehicle's electrical system – color coding and wire arrangement are maintained, which aids in diagnostics and potential future repairs.

By preserving the original electrical architecture, the harness supports the stable operation of comfort and safety systems intended for the rear right door panel.

Brand, Origin, and Item Condition

The product comes from the Mercedes line, which signifies compliance with factory quality and fitment standards for the W221 model. Using an original harness minimizes the risk of compatibility issues, communication errors between modules, or improper operation of receivers.

The item is offered as a used part, which means it comes from a dismantled vehicle and has been verified for its suitability for further use. For many users, this represents a reasonable compromise between cost and maintaining the factory specifications of the electrical system.

Installation and Service Application

The right rear door wiring harness for Mercedes W221 is suitable for both post-accident repairs and for rectifying faults resulting from mechanical damage or wire chafing in grommets. Replacing the complete harness is often a faster and more predictable solution than spot soldering individual wires.

• Reduced risk of installation errors – a ready-made harness with factory connectors minimizes the need for intervention in the wire structure.
• Restoration of full door functionality – a correctly selected component allows for the restoration of original electrical system operation in the rear right door.
• Diagnostic support – a consistent, unmodified harness facilitates subsequent measurements and fault localization.

Related Products and Technical Knowledge

If you need other Mercedes wires, harnesses, and connectors for your car, check out the Mercedes wires, harnesses, and connectors available in our store to select compatible electrical system components for other areas of the vehicle.

When planning a broader range of repairs, it is worth understanding the specifics of the used parts market – especially for larger powertrain components. We encourage you to read the guide Why Buy Used Gearboxes and Engines – Facts Instead of Myths, which explains how to select parts by OEM numbers and shows how to make informed choices from the dismantled parts offering.