Mercedes W204 C200CDI BlueEFFICIENCY OM651.913 Engine ECU Kit A6519007500 Keys

Mercedes W204 C220CDI Engine Control Unit A6519007500 is a specialized electronic control unit designed for C220CDI diesel engines with an automatic transmission. This component from the Electronic Control Modules and Units group is responsible for precise engine operation management, ensuring stable parameters and proper cooperation with other vehicle systems. It's a solution for users who expect proven, factory-standard engine control.

Specifications and technical data

• SKU: A6519007500-2
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6519007500
• Substitutable numbers: A6519007500, A 651 900 75 00, A0064461540, A 006 446 15 40, A2079052600, A 207 905 26 00, KZ
• Fuel type: Diesel
• Gearbox type: Automatic
• Category: ECUs & Computer Modules

Purpose and Function of the Engine Control Unit

The presented engine control unit is designed to work with the Diesel engine in the W204 C-Class, specifically the C220CDI version. The unit monitors key engine operating parameters such as fuel injection quantity, boost pressure, and injection corrections, and coordinates communication with other modules in the vehicle. This ensures the powertrain operates smoothly, and the throttle response remains predictable and consistent.

An important aspect is also the adaptation of the control unit's software to work with the automatic transmission, allowing for smooth gear changes and proper torque management. Using a dedicated control module reduces the risk of communication errors within the vehicle network and simplifies service diagnostics.

Compatibility and Interchangeable Numbers

The engine control unit has an original OEM part number and assigned interchangeable numbers, which facilitates selecting the correct module for a specific vehicle configuration. The presence of multiple reference numbers allows the control unit to be used in various equipment variants within the same engine family, while maintaining compatibility with the factory electrical system.

Before purchasing, it is advisable to compare the markings with the currently installed control unit or verify them using the VIN in the service documentation. This approach minimizes the risk of incompatibility and speeds up the installation and adaptation process in the vehicle.

Characteristics of Operation with Diesel Engines and Automatic Transmissions

The control unit has been developed with the specifics of a diesel engine in mind, where precise control of fuel injection and boost pressure is crucial. Appropriately calibrated operating maps help maintain a balance between performance, fuel consumption, and component durability. This allows the C220CDI engine to operate stably in both urban conditions and highway driving.

Cooperation with an automatic transmission requires seamless communication between modules, so using the correct engine control unit directly impacts the smoothness of gear changes. A properly selected control unit enhances user comfort, reduces jerking during downshifts, and helps maintain appropriate engine RPMs in various driving modes.

Condition, Origin, and Benefits of Using a Used Control Unit

The offered engine control unit is a used part, sourced from a dismantled Mercedes vehicle. Choosing an original module from the aftermarket is a cost-effective solution while maintaining factory construction and compatibility with the vehicle's electrical system. This type of control unit is particularly attractive for operational repairs where restoring proper powertrain function without altering the wiring harness is a priority.

The main advantages of using an original, used control unit include:

• factory fit for the W204 model's electrical architecture,
• maintained compatibility with other electronic modules in the vehicle,
• diagnosable using standard service tools,
• attractive cost-to-functionality ratio compared to new aftermarket parts.

Mercedes Electronic Control Modules and Units – Expansion and Service

When working on the powertrain, it is often necessary to replace or configure several electronic components simultaneously. 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 modules, transmission control units, or auxiliary system management units, check the available parts in the Mercedes Electronic Control Modules and Units category.

More About the Role of Original Control Units in Modern Cars

Modern cars rely heavily on communication between numerous electronic modules, so the quality and origin of control units directly impact the vehicle's character. If you are interested in how original modules and electronic components help maintain the factory characteristics of premium cars, it is worth reading the article on our blog: Audi and Pure Emotion. How Used Parts Help Maintain Brand DNA?.