Mercedes-Benz W245 B200 Turbo M266 Engine Control ECU A2661536479 Automatic

Mercedes-Benz W245 B200 Turbo M266 Engine Control ECU is a specialized electronic control module designed for the M266 engine unit paired with an automatic transmission. It is responsible for precise engine management, ensuring stable power characteristics, proper throttle response, and correct communication with other vehicle systems. This solution is dedicated to users looking for a proven ECU module matched to a specific drivetrain configuration.

Specifications and technical data

• SKU: A2661536479
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2661536479
• Substitutable numbers: A2661536479, A 266 153 64 79, A0014460440, A 001 446 04 40, 5WK90939, KZ
• Gearbox type: Automatic
• Category: ECUs & Computer Modules

Purpose and function of the controller

The presented module belongs to the Electronic control modules and controllers category and is designed to support the M266 engine in the Mercedes-Benz B-Class W245 series, specifically the B200 Turbo version. The ECU manages, among other things, fuel injection, ignition, boost pressure, and integration with safety and comfort systems, which translates into predictable vehicle behavior under various road conditions.

The version designed for an automatic transmission is configured to work with the appropriate gearbox, which is crucial for smooth gear shifting, engine load strategies, and correct communication within the vehicle's network. As a result, this controller is the right choice when replacing an ECU in vehicles factory-equipped with an automatic transmission.

Benefits of using a dedicated ECU

Using the correct engine controller in a Mercedes-Benz W245 B200 Turbo allows for the preservation of factory engine performance parameters and compatibility with the software of other modules. In practice, this means:

• proper cooperation with the automatic transmission,
• stable engine operation across the entire RPM range,
• consistent communication within the vehicle's electronic network,
• the ability to perform further diagnostics using standard service tools.

As an ECU component, this module is key to resolving issues with starting, rough engine idling, communication errors, or improper interaction with the automatic transmission. A properly selected controller facilitates the restoration of full drivetrain functionality without the need for costly modifications.

Product characteristics and service application

The offered controller comes from a Mercedes vehicle and is intended for reinstallation in cars with a similar configuration. It is suitable both for standard replacement of a damaged ECU and for more advanced engine control system repairs where matching the module to a specific equipment version is required.

Due to the nature of automotive electronics, it is recommended to verify compatibility by part number before installation and to prepare for potential adaptation or programming procedures in the vehicle. Proper matching of hardware and software parameters helps avoid CAN communication issues, engine control errors, or improper automatic transmission operation.

Professional selection and technical knowledge

When choosing a used ECU for a Mercedes, it is worth relying on reliable technical data and service experience. Using the OEM number, interchangeable part numbers, and information about the transmission type can be helpful to ensure full compatibility with a specific vehicle. This allows the module to be used as an effective repair solution without the need to purchase expensive new components.

If you want to deepen your knowledge about selecting and installing used control modules, how to check compatibility, and practical aspects of installation, check out the Global Parts guide: Used automotive electronics on board – why is it worth choosing second-hand ECU modules and sensors?

Expanding electronics upgrades in your Mercedes

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