Mercedes W204 W212 M271 Engine Wiring Harness A2711500620 is a complete, factory harness from the Wires, Harnesses, and Connectors category, designed for M271 gasoline engines in C-Class W204 and E-Class W212 models. The offered component ensures a stable electrical connection of all key gasoline engine components, which translates to reliable operation of the fuel supply, ignition, and control systems.
Specifications and technical data
- SKU: A2711501920
- Mark: Mercedes (Genuine OE)
- Condition: Used
- OEM Part Number: A2711501920
- Substitutable numbers: A2711501920, A 271 150 19 20
- Fuel type: Petrol
- Category: Wiring Harnesses, Cables & Connectors
Engine Harness Purpose and Function
The engine harness discussed is specifically designed for M271 gasoline engines, where it is responsible for the integration of sensors, actuators, and the engine control unit. A correctly selected harness minimizes the risk of interference, voltage drops, and communication issues between modules, which directly impacts the engine's running smoothness and performance.
Thanks to its factory fit for the specific engine bay architecture in Mercedes W204 and W212, the wires are routed in an organized manner, maintaining appropriate bending radii and mounting points. This helps to reduce mechanical stress and the influence of temperature, which is particularly important in gasoline engines where the harness runs close to high-temperature components.
Construction, Connectors, and Compatibility
This harness belongs to the Wires, Harnesses, and Connectors group, meaning it includes a complete set of wires with factory connectors matched to the M271 engine's accessories. The connectors used are prepared to work with original sensors and actuators, facilitating plug-and-play installation without the need for modifications.
Appropriately selected wire gauges and shielding of individual signal lines contribute to the stable operation of control systems in the gasoline engine. In practice, this means proper handling of ignition, fuel injection, boost control (if applicable), and auxiliary systems, without errors resulting from electrical interference.
Condition, Inspection, and Installation
This item is a used part and is offered as a used engine harness, allowing for an economical repair of the electrical system in a Mercedes while maintaining original manufacturing quality. Before installation, a standard visual inspection of the insulation, sockets, and latches is recommended, as well as continuity testing of circuits in critical sections, especially in areas prone to bending.
During installation, pay attention to the correct routing of wires in the factory mounts and avoid contact with sharp edges and high-temperature components. Maintaining the original harness route in the M271 engine bay minimizes the risk of future mechanical and thermal damage, and also facilitates potential diagnostics.
Selection by OEM Number and Technical Support
To ensure full compatibility with your specific Mercedes W204 or W212 version, it is recommended to compare the harness's OEM number and connector configuration with the factory-installed part. If in doubt, matching by vehicle VIN is also helpful to avoid compatibility issues with the gasoline engine's accessories.
If you want to check step-by-step how to correctly select an engine harness by OEM number or VIN, use the practical guide: Guide: How to Select the Right Car Part by VIN and OEM Number, where you will find a procedure, examples, and a list of helpful questions for purchasing used electrical components.
Related Wires, Harnesses, and Connectors for Mercedes
If you are modernizing or repairing the electrical system in your Mercedes and also need other parts from the same group, such as additional wiring sections, connectors, or cable fragments for various components, check the available parts in the Mercedes Wires, Harnesses, and Connectors category.
