Mercedes W204 C207 W212 M271.820 156HP Engine ECU Kit A2711500391 Automatic

Mercedes W204 C207 W212 M271.820 156HP Engine ECU Kit is a complete engine control unit set designed for Mercedes vehicles equipped with the M271.820 petrol engine and an automatic transmission. The kit belongs to the Electronic control modules and controllers group, which ensures component consistency and proper integration with the vehicle's electrical system. This is a solution for users who require a professional engine controller replacement based on the original Mercedes architecture.

Specifications and technical data

• SKU: A2711500391-12
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2711500391
• Substitutable numbers: A2711500391, A 271 150 03 91, A0034468840, A 003 446 88 40, 5WK91301, A2075450108, A 207 545 01 08
• Fuel type: Petrol
• Gearbox type: Automatic
• Category: ECUs & Computer Modules

Purpose and compatibility

The engine ECU kit has been designed to work with the 156 HP M271.820 unit in Mercedes C-Class (W204), E-Class (W212), and C207 body models. The controller is configured for a petrol engine, allowing it to support the ignition characteristics, fuel dosing, and operating strategies typical for this unit. Adaptation for an automatic transmission ensures proper communication with the gearbox module, which is crucial for smooth gear shifting, kick-down functionality, and downshift strategies.

Characteristics of the engine ECU kit

The presented kit belongs to the Electronic control modules and controllers group, meaning all elements are tuned for communication within the vehicle's network. Using an original Mercedes solution allows for maintaining factory operating logic, including ignition control, fuel dosing, emission control, and cooperation with safety systems. The kit is particularly useful when replacing a damaged controller or when it is necessary to transfer a complete control system between vehicles with similar configurations.

Benefits of using a pre-owned ECU kit

Choosing a pre-owned engine ECU kit is a solution that allows for significant repair cost savings while maintaining the vehicle's original electronic architecture. Modules in this group are designed with high durability, which is why, under proper operating conditions, they maintain stable performance parameters even after being removed from another vehicle. Using a set matched to a specific fuel type and transmission minimizes the risk of CAN network communication issues and reduces the need for additional software modifications.

Professional selection and installation

To correctly select such a kit for a specific Mercedes vehicle, it is recommended to use the OEM number and interchangeable numbers, as well as vehicle data (VIN, engine type, transmission type). This helps avoid hardware and software incompatibilities that could result in engine or transmission malfunctions. Installation of the kit should be performed by a workshop experienced in working with Mercedes electronics, which facilitates proper adaptation and any necessary coding procedures.

If you are planning a comprehensive repair or upgrade of your Mercedes engine area and need other components from the same group, such as controllers, comfort modules, or powertrain management units, check out the parts available in the Mercedes electronic control modules and controllers category.

Technical support and OEM selection

When working with powertrain electronics, it is particularly important to understand the dependencies between hardware and software versions of controllers, as well as the principles of selection based on OEM and reference numbers. Practical tips on choosing used modules, including ECUs, can be found in the Global Parts guide: Used automotive electronics on board – why is it worth choosing second-hand ECU modules and sensors?. The article discusses compatibility issues, installation procedures, and frequently asked questions related to installing used controllers.