Mercedes CL203 Rear Tail Light Lamp Wiring Cable Loom Left N/S A2038204764

Mercedes CL203 Rear Tail Light Lamp Wiring Cable Loom Left N/S is an original electrical installation component designed to support the rear lighting on the left side of the vehicle body. Thanks to its factory-fit design for Mercedes models, it ensures a stable electrical connection, reducing the risk of faults related to rear lighting. It is a practical solution for post-collision repairs, lamp replacement, or damage to the factory wiring harness.

Specifications and technical data

• SKU: A2038204764-1
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2038204764
• Substitutable numbers: A2038204764, A 203 820 47 64
• Location on the vehicle: Rear, Left
• Part type: Loom
• Category: Wiring Harnesses, Cables & Connectors

Purpose and function in the vehicle

The presented wiring harness is a component from the Wires, harnesses, and connectors group, responsible for supplying power and control signals to the rear lamp on the left side of the vehicle. Its location in the rear zone means the component operates in an environment exposed to moisture, vibrations, and temperature changes, which is why using an original harness is important for the reliability of the lighting system.

The harness supports circuits typically assigned to the rear lamp, such as position lights, brake lights, turn signals, or license plate lighting (depending on the specific vehicle configuration). A correctly selected component helps avoid issues with installation errors, flickering lights, or intermittent power loss.

Benefits of using an original Mercedes harness

Using a factory wiring harness in Mercedes models provides a number of practical assembly and operational benefits:

• secure fit of wire lengths and connectors to the body geometry,
• maintenance of proper installation routing within the rear part of the vehicle,
• reduction of the risk of incorrect connections during post-accident repairs,
• easier diagnostics of potential lighting faults in the future.

The original rear left lamp harness is also a way to maintain the consistency of the electrical installation without the need for modifications, soldering, or creating additional wire sections. For workshops, this means faster assembly, and for the user – more predictable lighting system operation.

Characteristics of the used component

The offered harness comes from dismantling, which allows for maintaining the original construction and connector layout consistent with the Mercedes factory standard. The used component is a good solution in situations where only part of the installation within the rear lamp area has been damaged, while the remaining electrical elements of the vehicle remain functional.

A harness of this type is particularly useful for:

• repairs after mechanical damage to the rear part of the body,
• replacing the lamp with an element of the same specification,
• eliminating problems with wire chafing or corrosion in the trunk area.

Selection and integration with the vehicle installation

To ensure proper cooperation with the electrical installation, it is essential to match the harness to the specific model and equipment version of the Mercedes. The product features dedicated connectors and a wire layout prepared for installation in the rear, left part of the vehicle, which facilitates integration with the existing installation without the need to modify factory harnesses.

In case of doubts regarding compatibility, it is worth verifying the part markings and the rear lamp configuration in the vehicle to avoid problems with light operation after installation. A correctly selected harness allows for maintaining the functionality of lighting systems in accordance with the manufacturer's requirements.

Expanding repairs within the Mercedes electrical installation

If you are planning a comprehensive repair or upgrade of the rear electrical installation zone in your Mercedes and need other elements from the same group, such as additional harnesses, wire sections, or lamp connectors, check the available parts in the Mercedes wires, harnesses, and connectors category.

For drivers interested in broader topics of car system repairs, including the optimal selection of original parts from dismantling, the following guide article may be helpful: Lack of cooling in the car: original used air conditioning compressor as a proven alternative to expensive new parts, which discusses a practical approach to using used OEM components.