Rear Lamp Mercedes W212 Saloon Right O/S Light Socket Plug Wiring A0255452226

Rear Lamp Mercedes W212 Saloon Right O/S Light Socket Plug Wiring is an original electrical connector with a wiring harness, designed to support the right rear lamp in the saloon body style. This item belongs to the Rear lights and brake lights group and is a key component of the lighting system, ensuring a stable connection between the lamp and the vehicle's electrical installation. Thanks to its factory design, it is a service-friendly solution precisely matched to this specific generation of the Mercedes E-Class.

Specifications and technical data

• SKU: A2129066901-1
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2129066901
• Substitutable numbers: A2129066901, A 212 906 69 01, A0255452226, A 025 545 22 26
• Location on the vehicle: Rear, Right
• Category: Rear Light Assemblies

Purpose and function in the vehicle

The presented socket with wiring harness is designed for installation in the rear right part of the Mercedes E-Class W212 saloon body. It is responsible for the electrical connection of the rear lamp, including the circuits for the position light, brake light, turn signal, or reversing light – depending on the configuration of the specific lamp used in the given vehicle. The factory connector geometry facilitates proper seating of the holder in the lamp and minimizes the risk of contact looseness.

Construction of the connector and harness

The rear lamp socket consists of a plastic housing adapted for operation in the trunk compartment and a section of wiring harness terminated with the appropriate installation plug. The pin layout complies with the manufacturer's standard, which allows for seamless cooperation with the original rear lamp and the vehicle's electrical system. Stable electrical contacts reduce voltage drops and lighting flickering, and the appropriately selected wire length facilitates maneuvering the component during installation and service.

Benefits of using an original socket

Using the original rear lamp socket in a Mercedes W212 brings a number of practical benefits:

• secure fit for the right rear lamp in the saloon body,
• maintenance of the correct sequence and load capacity of lighting circuits,
• reduction of the risk of installation errors, such as loose contacts or incorrect wiring connection,
• easier diagnostics of lighting faults thanks to the preservation of the factory harness layout.

For the user, this means stable operation of the rear and brake lights, which translates into better vehicle visibility on the road and compliance with safety requirements.

Condition and service application

The item comes from dismantling and is offered as a used part, making it an attractive solution for post-accident repairs, replacing a damaged socket, or restoring the efficiency of the lighting system in an older vehicle. Replacing the socket with the harness is particularly recommended in situations where there are problems with intermittent lamp operation, signs of contact overheating, or mechanical damage to the wires.

Integration with other lighting elements

The socket works with the factory rear lamp and is part of a larger vehicle lighting system. During comprehensive rear body repairs, it is worth paying attention to the condition of the lamp itself, seals, and other parts of the harness to avoid the recurrence of faults. If you are planning a comprehensive repair or upgrade of the rear lighting zone in your Mercedes and need other elements from the same group, such as combination lamps, control modules, or additional holders, check the available parts in the Mercedes rear lights and brake lights category.

Additional technical support

During service work on the suspension and body, it is also worth taking care of the general condition of the vehicle's handling, which has a direct impact on safety during braking and signaling. To better plan your inspection and repairs, you can use the advice contained in the article Suspension system – a comprehensive guide to shock absorbers, wishbones, and stabilizers, which helps to understand the dependencies between suspension elements and driving comfort and stability.