Mercedes W245 B 180 CDI OM640.940 109HP Engine Unit ECU Manual A6401504879

Engine Control Unit Mercedes W245 B 180 CDI OM640.940 109HP is a component from the Electronic Control Modules and Units group, designed for a diesel engine working with a manual gearbox. This solution allows for the restoration of proper powertrain operation, ensuring stable engine performance parameters and correct communication with other vehicle systems.

Specifications and technical data

• SKU: A6401504879
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6401500534
• Substitutable numbers: A6401500534, A 640 150 05 34, 0281012431, 0 281 012 431
• Fuel type: Diesel
• Gearbox type: Manual
• Category: ECUs & Computer Modules

Purpose and Function of the Engine Control Unit

The presented control unit is dedicated to the diesel engine in the Mercedes B-Class W245 series, specifically the B 180 CDI version with 109 HP. It is responsible for advanced engine management, including fuel injection, boost control, auxiliary equipment operation, and cooperation with the manual gearbox. Thanks to this, the powertrain maintains appropriate dynamics, smooth operation, and predictable response to the accelerator pedal.

Benefits of Using an Original Module

Using an original electronic control module in the Mercedes W245 allows for the preservation of factory control logic and full compatibility with the vehicle's electrical system. The control unit is designed to work with a specific configuration of the diesel engine and manual transmission, which reduces the risk of communication errors within the vehicle network and diagnostic problems. This is particularly important in repairs where restoring the car's original operating parameters is crucial.

Technical Characteristics and Integration with the Vehicle System

As a component from the Electronic Control Modules and Units category, the engine control unit is the central point for managing the powertrain's operation. It works with sensors and actuators in the diesel fuel system, intake system, and systems responsible for driving safety and comfort. Its adaptation for a diesel engine and manual gearbox ensures that the control logic is matched to the torque characteristics and power delivery method.

Application in Repairs and Diagnostics

This control unit is suitable for both typical replacement of a damaged module and more complex powertrain repairs in the Mercedes W245 B 180 CDI. A correctly selected module facilitates diagnostic work, allows for accurate error reading, and enables effective programming and adaptation when used with professional service equipment. This makes it possible to restore stable engine operation without the need for intervention in additional components.

Condition and Origin of the Component

The offered control unit is a used part, sourced from dismantling, which allows for economical repair while maintaining the original manufacturer's specifications. This type of solution is often chosen by workshops specializing in the Mercedes brand, which prioritize compliance with the vehicle's factory configuration and the possibility of further service support based on standard procedures.

Related Modules and Development of Service Knowledge

Modern cars, including the Mercedes B-Class, utilize an extensive electronic architecture, similar in concept to solutions used in other premium brands. If you want to better understand how advanced engine control systems and comfort modules work in BMW 3 and 5 Series models, it is worth consulting the guide: Years of Driving Pleasure – How to Care for iDrive Systems and Electronic Modules in BMW 3 and 5 Series Models. This will help you better plan diagnostics and repairs in other vehicles with complex electronics as well.

If you are interested in a broader perspective on the use of dismantled parts in vehicle repairs across various brands, a practical guide to the aftermarket may be helpful: Best Used Car Parts – A Guide to the Most Frequently Chosen Original Parts. This is a good addition to your knowledge when planning budget-friendly yet technically sound repairs.

If you are planning a comprehensive repair or upgrade of the engine area in your Mercedes and need other parts from the same group, such as engine control units, powertrain management modules, or electronic systems cooperating with the drivetrain, check the available parts in the category Mercedes Electronic Control Modules and Units.