Mercedes-Benz C W203 Rear Left Right Door Wiring Loom Harness A2035407308

Description

Mercedes C W203 Door Wiring Harness Left Right Rear is an original electrical installation component from the Wires, Harnesses, and Connectors group, designed for the rear left and right doors. The product ensures proper electrical connection between the doors and the vehicle body, contributing to the stable operation of electrical equipment in the rear of the Mercedes vehicle.

Specifications and technical data

• SKU: A2035407408
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2035407308
• Substitutable numbers: A2035407408, A 203 540 74 08, A2035407308, A 203 540 73 08, EM
• Location on the vehicle: Rear, Right, Left
• Category: Wiring Harnesses, Cables & Connectors

Vehicle Application and Placement

The wiring harness is designed for installation in the rear of the car, serving both the left and right sides. Its placement in the rear door area allows for correct power supply and control of electrical components located within the door panels, such as actuators, switches, or other installation components.

Thanks to precise fitting to the specific body structure, the harness allows for maintaining factory wiring routing, which reduces the risk of chafing, looseness, and improper installation layout in the space between the door and the pillar.

Technical and Functional Characteristics

As a component from the Wires, Harnesses, and Connectors category, the product is a complete section of the electrical installation dedicated to the rear of the vehicle. The connectors used are prepared to work with factory sockets in the doors and body, which facilitates installation and reduces the need for additional modifications.

The arrangement of wires and mounting points is adapted to the geometry of the doors and grommets, which helps maintain the correct bending radius of the wires when opening and closing the doors. This solution contributes to longer installation durability and stable electrical parameters during operation.

Benefits of Using an Original Mercedes Wiring Harness

Using a factory-designed wiring harness for the C W203 model allows for maintaining the consistency of the electrical installation with the rest of the vehicle’s system. Proper matching of wire lengths, connector types, and mounting points translates to:

• secure electrical connections within the rear doors,
• reduced risk of installation errors during assembly,
• easier diagnosis of potential future faults,
• maintenance of factory wiring routing standards.

The product is a used part, which in practice allows for an economical replacement of a damaged wiring harness while maintaining the original manufacturer’s technical specifications.

Selection, Compatibility, and Application

To correctly select the wiring harness for a specific body version and equipment, it is advisable to pay attention to compliance with manufacturer markings and vehicle placement. The product is intended for installation in the rear of the car, on the left and right sides, allowing for the servicing of both rear doors in one set.

In practice, replacing the wiring harness is recommended in situations where there are problems with the power supply or control of electrical components in the rear doors, mechanical damage to the wires in the grommets, or signs of insulation overheating. Using an original Mercedes component helps restore the correct operation of the installation without the need to interfere with factory electrical diagrams.

Expanding the Installation within Mercedes Wires and Harnesses

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

For drivers interested in broader powertrain modernization and adapting the vehicle’s characteristics to their driving style, a technical guide may be helpful – you can find more information in the article Used Drive Axles and Differentials – How to Choose Ratios for Your Driving Style.