Mercedes W204 Wiring Loom Cable Door Rear Left Right N/O/S A2045402710

Mercedes W204 Wiring Loom Cable Door Rear Left Right N/O/S is an original electrical installation component designed for the rear body section of Mercedes vehicles. The product belongs to the Wires, looms and connectors group, which means it is responsible for a stable electrical connection between the door and the rest of the vehicle's installation. This is a solution for users who want to restore the proper operation of the door electrics while maintaining the manufacturer's factory design.

Specifications and technical data

• SKU: A2045402710
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2045402710
• Substitutable numbers: A2045402710, A 204 540 27 10
• Location on the vehicle: Rear, Right, Left
• Category: Wiring Harnesses, Cables & Connectors

Purpose and placement in the vehicle

The presented wiring loom is a component of the door installation in the rear part of the body, intended for installation on the left or right side, depending on the body configuration. Its placement in the rear door area means it is responsible for transmitting signals and power between the door and the vehicle's main electrical installation, which is important for the operation of components such as actuators, window controls, or door lighting, if present in the car's specific configuration.

Technical and functional characteristics

As an element from the Wires, looms and connectors group, the loom has been designed for stable signal routing and protection of wires against mechanical damage at typical door hinge points. The factory design ensures proper cable routing in grommets and mounts, which reduces the risk of chafing and circuit breaks during repeated opening and closing of the door.

The original connectors are matched to the vehicle's installation, which facilitates assembly and allows for compliance with the factory electrical diagram. Thanks to this, the loom can be used as a replacement for a damaged section of the installation without the need to interfere with the main body harness, which is beneficial both in technical and service terms.

Benefits of using an original Mercedes wiring loom

Using an original door wiring loom in the Mercedes W204 model allows for maintaining the consistency of the electrical installation with the manufacturer's specifications. This is particularly important in vehicles equipped with extensive comfort systems, where the stability of communication between modules affects the proper operation of control functions.

The main advantages of this solution include:

• Factory-matched connectors – no need for installation modifications or the use of adapters.
• Proper wire routing in the door hinge zone, which reduces the risk of damage during operation.
• The ability to restore the proper operation of door electrics after a failure or mechanical cable damage.
• Consistency with the vehicle's service documentation and electrical diagrams.

Product condition and service application

The wiring loom is an aftermarket component, which allows for an economical repair of the installation while maintaining the original design. This type of component is particularly useful in situations where the vehicle experiences intermittent power loss in the doors, problems with window operation, central locking, or other functions dependent on wires passing through the door hinge.

Replacing a damaged loom with an original element from the same assembly group is the preferred solution in professional service, as it limits the number of soldered connections and non-factory connectors, which translates into greater system reliability in the long term.

Expanding the modernization of the Mercedes electrical installation

If you are planning a comprehensive repair or modernization of the door electrical installation area in your Mercedes and need other elements from the same group, such as additional loom sections, connectors, or wire branches, check the available parts in the Mercedes Wires, looms and connectors category.

If you want to better understand the specifics of the second-hand parts market and learn practical tips on choosing used components, the following guide article may be helpful: Used parts – key benefits and what to look for when buying.