Mercedes W245 B180 266.940 Engine Control Module ECU A2669000200 Automatic

Mercedes W245 B180 266.940 Engine Control Unit Kit A2669000200 Automatic is a complete kit from the electronic control modules and controllers group, designed for Mercedes B-Class vehicles with an automatic transmission. This solution is for users who need a professional engine control unit replacement based on the original Mercedes electronics architecture.

Specifications and technical data

• SKU: A2669000200
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2669000200
• Substitutable numbers: A2669000200, A 266 900 02 00, A0024463040, A 002 446 30 40, 5WK90981, A1695452932, A 169 545 29 32, A1695452308, A 169 545 23 08
• Gearbox type: Automatic
• Part type: Engine Control Unit (ECU)
• Category: ECUs & Computer Modules

Kit Purpose and Characteristics

The offered engine control unit kit is dedicated to the engine unit designated as 266.940 in the Mercedes W245 B180 model with an automatic transmission. The design based on the factory ECU module ensures the preservation of original engine operating parameters, correct communication with the vehicle's electrical system, and consistency with safety and comfort systems.

As an element from the electronic control modules and controllers category, the product is designed to work with the vehicle's CAN bus, handling, among other things, fuel injection management, ignition, auxiliary equipment operation, and data exchange with other onboard controllers.

Benefits of Using an Original Mercedes Control Unit

Using an original control unit in a Mercedes W245 B180 allows for:

• Maintaining factory engine operating parameters – preserving injection maps, ignition strategies, and engine protection logic in line with manufacturer specifications.
• Full integration with the automatic transmission – correct signal exchange between the engine ECU and the transmission control module, which affects the smoothness of gear changes.
• Stable communication with other modules – cooperation with ABS/ESP systems, comfort module, or instrument cluster without the need for electrical system modifications.
• Reducing the risk of communication errors – a lower probability of random errors in the CAN network compared to non-original solutions.

Condition, Origin, and Installation Aspects

The product is used, which in practice means the possibility of an economical vehicle repair while maintaining original quality of workmanship. The kit comes from dismantling, allowing the user to receive a complete module prepared for further configuration for a specific car.

During installation, it is recommended to:

• Verify compatibility by OEM number and interchangeable numbers – this allows confirmation of compatibility with the specific engine and equipment version.
• Program and adapt the control unit – perform procedures for immobilizer matching, equipment coding, and potential software updates at a specialized service center.
• Check the electrical system – inspect wiring harnesses, grounds, and power supply to avoid recurring faults due to damaged wires or connectors.

Application in Vehicles with Automatic Transmission

The control unit has been prepared to work with an automatic transmission, which is crucial for the correct operation of the entire powertrain. Proper matching of the ECU software to the automatic transmission affects:

• Smooth gear changes – correct timing of gear shifts and downshifts.
• Component protection – limiting stress on the transmission and engine through appropriate torque control strategies.
• Driving comfort – predictable vehicle behavior in various operating modes (e.g., city driving, highway).

Selection, Compatibility, and Technical Support

To correctly select this control unit for a specific Mercedes model, it is advisable to use the OEM number, interchangeable numbers, and vehicle data (VIN, engine type, transmission type). This helps avoid problems with hardware or software incompatibility and speeds up the installation process.

If you are looking for other Mercedes electronic control modules and controllers, check out our dedicated offer: Mercedes electronic control modules and controllers.

You can find more practical information on how to consciously choose used engine control units and other ECU modules in our guide: Used Automotive Electronics – Second-Hand ECU Modules and Sensors.