Mercedes W169 A150 M266.920 95HP Engine Control Module A2661536779 Automatic

Mercedes W169 A150 M266.920 95HP Engine Control Module Automatic is a factory-original engine control unit designed for a petrol engine paired with an automatic transmission. This used module from the Electronic control modules and controllers category allows for professional repair of the drivetrain without the need for costly replacement of all components. It is a solution for users and workshops that expect proven electronics with their original, factory-specified operating characteristics.

Specifications and technical data

• SKU: A2661536779
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2661536779
• Substitutable numbers: A2661536779, A 266 153 67 79, A0014460340, A 001 446 03 40, 5WK90942
• Fuel type: Petrol
• Gearbox type: Automatic
• Category: ECUs & Computer Modules

Purpose and function of the controller

The presented engine controller is dedicated to the petrol engine in the Mercedes A-Class W169 generation, A150 version, paired with an automatic transmission. It is responsible for precise engine management, including fuel injection, ignition timing, and communication with other vehicle systems. As a result, the drivetrain maintains proper operating standards, and throttle response remains predictable and consistent with the manufacturer's original specifications.

The module belongs to the Electronic control modules and controllers category, meaning it is a key component for communication between sensors, engine peripherals, and the vehicle's other electronic systems. A correctly selected controller allows for the restoration of full vehicle functionality after an ECU failure, starting issues, or unstable engine operation.

Benefits of using a pre-owned Mercedes controller

Choosing an original, used controller for a Mercedes W169 A150 is a solution that combines reasonable costs with the preservation of the engine's factory operating characteristics. The module comes from a vehicle of the same brand, ensuring structural and software compatibility with the electrical installation and onboard system architecture. In practice, this means:

• the ability to restore proper engine operation without interfering with the mechanical components of the unit,
• maintenance of compatibility with the automatic transmission,
• reduced risk of communication issues within the CAN bus network,
• easier adaptation compared to non-factory aftermarket replacements.

For workshops specializing in the Mercedes brand, such a module is a practical service solution that allows for efficient repair while maintaining a high level of reliability.

Integration with the petrol system and automatic transmission

The controller has been designed to work with a petrol engine, so its operating maps, control algorithms, and sensor support are tailored to the specifics of a spark-ignition unit. In combination with an automatic transmission, it creates a cohesive system where the ECU coordinates engine performance parameters with gear-shifting logic. This configuration is particularly important for smooth acceleration, shifting comfort, and idle stability under various driving conditions.

A properly selected control module helps avoid common issues such as jerking during gear changes, incorrect idle speed, or intermittent engine stalling. This is especially important in vehicles used daily, where predictability and safety are paramount.

Professional selection and installation of the controller

To fully utilize the potential of this controller, installation by a specialized service center is recommended to ensure proper connection, potential coding, and adaptation to the specific vehicle. During the selection process, it is advisable to use manufacturer markings and interchangeable part numbers, which minimizes the risk of incompatibility. For users who want to learn more about choosing used automotive electronics, the following article will be useful: The second life of electronics – when is it worth choosing used engine controllers, comfort modules, and parking sensors?.

If you want to further streamline the process of selecting parts by manufacturer numbers or factory markings, a practical step-by-step guide may be helpful: how to choose the right car part by VIN and OEM number. This will make it easier to verify the module's compatibility with your specific Mercedes configuration.

Expanding repairs within Mercedes electronics

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 engine controllers, transmission management modules, or other ECU units, check the available parts in the Electronic control modules and controllers Mercedes category.

This approach allows you to organize the state of the electronics responsible for drivetrain operation in a single service stage, which translates into more stable operation of the entire system and reduces the risk of further vehicle downtime in the workshop.