Mercedes W213 Cable Door Harness Wiring Front Left Right N/O/S A2135407030

Mercedes W213 Cable Door Harness Wiring Front Left Right is an original door wiring harness designed for factory installation in W213 generation E-Class models. The component belongs to the Cables, harnesses and connectors group and is a key part of the door electrical system, responsible for a stable connection of modules and equipment in the front part of the vehicle on the driver's or passenger's side.

Specifications and technical data

• SKU: RHD-A2135407030
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2135407030
• Substitutable numbers: A2135407030, A 213 540 70 30
• Location on the vehicle: Front, Left, Right
• Category: Wiring Harnesses, Cables & Connectors

Application and vehicle placement

The presented harness is intended for installation in the front doors on the left or right side of the Mercedes E-Class W213. It is responsible for transmitting signals and power between the body wiring and components located in the door, such as controllers, switches, or other electrical elements provided in the specific vehicle configuration.

Thanks to the factory fitment for the specific W213 body generation, the harness maintains the correct length, connector layout, and proper routing of wires in the door grommets, which facilitates installation and reduces the risk of mechanical stress during door operation.

Construction, connectors and compatibility

The door harness has been designed as an OEM installation component, with a set of dedicated connectors for factory sockets in the door and pillar. Properly selected wire cross-sections and shielding of individual signal lines promote stable operation of control systems and limit interference in communication between modules.

The layout of plugs and mounting points is consistent with the original Mercedes design, which allows for:

• seamless fitment to factory holes and brackets in the door,
• maintaining the correct bending radius of wires in the grommet between the door and the body,
• keeping the electrical installation tidy and facilitating future diagnostics.

Performance characteristics and advantages

As an element from the Cables, harnesses and connectors group, this door harness has a direct impact on the proper operation of the front door electrical equipment. The use of the original design ensures:

• consistency with the factory electrical architecture of the Mercedes W213,
• proper fitment of connectors without the need for modifications,
• maintaining the clarity of the vehicle's electrical diagrams, which facilitates service and diagnostics.

The product is a used item, which in practice allows for an economical repair of the door installation while maintaining the original vehicle specification. This is a beneficial solution when replacing a damaged harness, e.g., after wire breakage in the grommet or mechanical interference.

Professional installation and part selection

Due to the importance of the door installation for the safety and comfort of the vehicle, installation by a person with experience in working with electrical systems in Mercedes cars is recommended. Before purchasing, it is worth verifying the compatibility of the vehicle configuration with the offered harness using the OEM part number and interchangeable numbers available in the technical specification.

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

Vehicle preparation and technical knowledge

When working with electrical installations, especially in the autumn and winter period, it is worth paying attention to the condition of wires, connectors, and rubber grommets in the doors. Additional tips on selecting used components, checking the installation, and preparing the car for low temperatures can be found in the article Winter essentials: which used car parts are worth checking and replacing before the frost?.