Mercedes W245 B150 M266.911 95HP Engine Unit ECU A2669000300 Automatic

The Mercedes W245 B150 M266.911 Engine Control Unit is a factory electronic control module designed for a 95 HP engine, compatible with an automatic transmission. It belongs to the Electronic Control Modules and Controllers group, engineered for precise engine management, fuel delivery, and communication with other vehicle systems.

Specifications and technical data

• SKU: A2669000300-1
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2669000300
• Substitutable numbers: A2669000300, A 266 900 03 00
• Gearbox type: Automatic
• Category: ECUs & Computer Modules

ECU Controller Purpose and Function

The presented ECU controller is dedicated to the Mercedes B-Class W245 series, specifically the B150 version with the M266.911 engine producing 95 HP. It is responsible for advanced control of the powertrain's operation, including combustion parameter control, ignition system coordination, and integration with safety and comfort systems. This ensures the vehicle maintains stable performance, predictable throttle response, and seamless operation with other onboard electronics.

Integration with Automatic Transmission

The controller is configured to work with an automatic transmission, which is crucial for smooth gear changes and proper shift timing. The engine electronics communicate with the transmission module to:

• synchronize engine torque with gear shifting logic,
• reduce jerks and unwanted drivetrain stress,
• maintain stable RPMs during acceleration and maneuvering,
• support driver assistance systems.

This synchronization is particularly important for daily urban driving, where frequent gear changes require cohesive cooperation between the engine controller and the gearbox.

Performance Characteristics and Installation Benefits

As a component from the Electronic Control Modules and Controllers category, this ECU is designed as a replacement module, enabling the restoration of correct powertrain operation after a failure of the original controller. In practice, this means:

• the ability to restore factory engine operating parameters after appropriate matching and configuration,
• maintaining compatibility with the vehicle's electrical system and communication bus,
• reducing the risk of communication errors between the engine controller and other vehicle modules.

The product is intended for users and workshops seeking a solution that adheres to the vehicle's factory architecture, without the need for wiring modifications or the use of universal replacements.

Condition and Technical Aspects of Installation

The offered controller is a used item, which means that standard workshop procedures should be anticipated before installation. These include verifying software compatibility, potential immobilizer matching, and adaptation to the specific vehicle instance. It is recommended that installation and configuration be performed by a service center experienced with Mercedes electronics and equipped with appropriate diagnostic tools.

To ensure full vehicle functionality, it is crucial to match the controller to the specific engine version and equipment. For this purpose, it is advisable to use the VIN and data from the original module to avoid communication issues between controllers and incorrect operation of onboard systems.

Selecting the Right ECU and Technical Support

When choosing a used ECU for a Mercedes, proper hardware and software matching is particularly important. To better understand the selection principles and installation process, it is recommended to consult the guide on safely using used automotive electronics, available in the article Used Automotive Electronics Onboard – Why Choose Second-Hand ECUs and Sensors?. You will find practical tips on compatibility verification, working with OEM numbers, and common installation-related questions.

Additionally, if you wish to deepen your knowledge on verifying component compatibility by OEM numbers in Mercedes vehicles, the guide on safe online shopping may be helpful: Risk-Free Online Parts Shopping – 5 Proven Ways to Verify Component Compatibility by OEM Numbers and Paint Codes. This is a practical source of information for workshops and users who are independently sourcing electronics for their vehicles.

Expanding the Control System in a Mercedes

If you are planning a comprehensive repair or upgrade of the engine control area in your Mercedes and require other components from the same group, such as additional control modules, auxiliary controllers, or component management units, check the available parts in the Mercedes Electronic Control Modules and Controllers category.