Mercedes W204 C220CDI BlueEFFICIENCY OM651.911 Engine ECU Kit A6519007500 Key

Mercedes W204 C220CDI BlueEFFICIENCY OM651.911 Engine ECU Kit is a specialized electronic control unit designed for diesel engines paired with an automatic transmission. It is responsible for the precise management of the diesel engine's operation, ensuring stable parameters, correct communication with other modules, and consistency with Mercedes' factory electrical architecture. As such, it represents a key component of the powertrain in the W204 C220CDI BlueEFFICIENCY model.

Specifications and technical data

• SKU: A6519007500-6
• 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
• Fuel type: Diesel
• Gearbox type: Automatic
• Category: ECUs & Computer Modules

Purpose and function of the engine control unit

The presented engine control unit has been designed to work with the OM651.911 unit in the Mercedes C-Class W204 generation in the C220CDI BlueEFFICIENCY version. As an item from the Electronic control modules and ECUs category, it is responsible for controlling fuel injection, monitoring diesel engine operating parameters, and exchanging data with other vehicle systems, including the automatic transmission.

Dedicating it to a specific powertrain configuration with a diesel engine and automatic transmission allows for maintaining the consistency of software, control logic, and the operating characteristics of the power unit. As a result, the engine control unit supports the maintenance of factory performance, refinement, and fuel economy.

Benefits of using an original Mercedes module

Using an engine control unit matched to the C220CDI BlueEFFICIENCY version provides a number of practical advantages:

• preservation of the factory operating characteristics of the diesel engine,
• proper cooperation with the automatic transmission,
• consistency with the vehicle's electrical installation and other modules,
• possibility of diagnostics in accordance with manufacturer standards.

For the user, this means stable engine starting, predictable throttle response, and correct communication with safety and comfort systems. When replacing a faulty control unit with the correct module for the W204 C220CDI, the risk of compatibility issues is minimized.

Technical characteristics in the context of the powertrain

The engine control unit works with the diesel fuel system, adapted to the requirements of the BlueEFFICIENCY version. The ECU manages the engine's operating parameters, taking into account the specifics of the automatic transmission, which translates into smooth gear shifts and appropriate fuel doses under various load conditions.

The presence of dedicated part numbers and interchangeable numbers allows for precise identification of the module in service catalogs and during diagnostics. This is particularly important when selecting a control unit for a specific equipment configuration and model year of the Mercedes W204.

Application in service practice

Replacing the engine control unit in a Mercedes C-Class W204 C220CDI BlueEFFICIENCY is a typical service operation in the event of electronic failures or communication problems within the vehicle network. Selecting the appropriate module from the same family of control units facilitates the adaptation and configuration process in the vehicle, and also allows for maintaining compliance with factory settings.

The product belongs to the Mercedes brand, which for workshops and users means maintaining the manufacturer's quality standards and predictable behavior of the control unit in daily operation. The used condition allows for the optimization of repair costs while maintaining the original technical specification.

Expanding knowledge and selecting used modules

When working with vehicle electronics, it is worth knowing the best practices for selecting and installing used components. In the context of preserving the character of premium brands and the quality of original parts, material describing how to properly use recycled parts in the luxury car segment can be helpful – more information can be found in the article Audi and emotions in their purest form – how used parts help maintain the brand's DNA.

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 controllers, power unit management modules, or electronic monitoring systems, check the available parts in the Electronic control modules and ECUs Mercedes category.