Mercedes W204 C200 CDI 651.913 136HP Engine Unit ECU Kit A6519007500 Automatic

Visual condition of the part

The product shows signs of use visible in the photos.

Mercedes W204 C200 CDI 651.913 136HP Engine Unit ECU Kit is a specialized electronic control unit designed for diesel engines paired with an automatic transmission. This component from the Electronic control modules and controllers category is responsible for precise engine management, ensuring stable power characteristics and proper cooperation with other vehicle systems. This used controller is a cost-effective service solution for users looking for a tested component at a reasonable price.

Specifications and technical data

• SKU: A6519007500-14
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6519007500
• Substitutable numbers: A6519007500, A 651 900 75 00, A0064461540, A 006 446 15 40
• Fuel type: Diesel
• Gearbox type: Automatic
• Category: ECUs & Computer Modules

Purpose and function of the engine controller

The presented engine computer is designed to work with the diesel engine in the Mercedes C-Class W204 generation, specifically the C200 CDI version with 136 HP. As the central element of the powertrain control system, the ECU analyzes signals from sensors, selects the fuel dose, corrects the injection timing, and coordinates the operation of engine accessories, which translates into smooth acceleration, predictable throttle response, and stable idle operation.

The controller is adapted to work with an automatic transmission, which is important for proper communication within the vehicle network and for gear-shifting strategies. This ensures the consistency of the powertrain operation, with the engine and transmission working under a single, optimized control algorithm.

Benefits of using a used ECU

Choosing a used engine computer for a Mercedes W204 C200 CDI is a solution that allows you to reduce repair costs while maintaining the vehicle's original electronic architecture. This type of controller is particularly useful in situations where the existing module has been damaged due to power surges, water ingress, or internal errors that prevent diagnostic communication.

The main advantages of this solution include:

• maintaining factory engine control logic and cooperation with the automatic transmission,
• the ability to restore full vehicle functionality without the need for costly replacement of the entire powertrain,
• compatibility with the existing electrical installation and other modules in the vehicle.

For workshops specializing in automotive electronics, such a controller provides a solid base for adaptation, programming, or cloning data from a damaged module, which helps reduce vehicle downtime.

Application in a diesel powertrain with an automatic transmission

The ECU dedicated to the diesel engine in the Mercedes W204 C200 CDI must account for the specific operating characteristics of a diesel unit, including injection control, boost pressure, exhaust gas recirculation, and component protection under variable loads. When combined with an automatic transmission, the controller coordinates operating parameters so that gear changes are as smooth as possible, and torque is delivered in a predictable manner without jerking.

A properly selected engine computer also helps maintain stable combustion parameters, which is important for fuel consumption and the operation of exhaust gas treatment systems. Proper communication between the ECU and other electronic modules of the vehicle affects the correct operation of safety and comfort functions.

Integration with vehicle electronic systems

As an element of the Electronic control modules and controllers category, this engine computer works with other modules in the vehicle network, such as transmission controllers, comfort systems, or safety systems. A correctly selected and prepared ECU allows for maintaining communication consistency on the data bus, which is crucial for proper diagnostics and stable operation of all systems.

If you are planning a comprehensive repair or upgrade of the engine area in your Mercedes and need other elements from the same group, such as engine controllers, comfort modules, or transmission controllers, check the available parts in the Electronic control modules and controllers Mercedes category.

Service knowledge and additional materials

When working with advanced vehicle electronics, it is worth using reliable sources of knowledge regarding programming, adaptation, and module diagnostics. Example procedures, communication problems on the bus, or issues related to replacing engine controllers are discussed in more detail in an article dedicated to iDrive systems and electronic modules in BMW. To expand your knowledge about the operation of modern controllers, it is worth reading the following material: Driving pleasure for years – how to take care of iDrive systems and electronic modules in BMW 3 and 5 series models using dismantled parts?

Summary

Mercedes W204 C200 CDI 651.913 136HP Engine Unit ECU Kit is a practical solution for users and workshops looking for an original, used controller for a diesel engine paired with an automatic transmission. A properly selected and prepared module allows you to restore full functionality of the powertrain, maintaining the factory performance characteristics of the engine and proper integration with the vehicle's other electronic systems.