Mercedes W203 C200 CDI OM646.962 122HP ECU Engine Module A6461506679 Automatic

Mercedes W203 C200 CDI OM646.962 122HP ECU Engine Module Automatic is an original electronic engine control module designed for the diesel unit in the automatic transmission version. This used ECU comes from the Mercedes factory line, which ensures full compatibility with the vehicle's electrical architecture and stable cooperation with the powertrain. By maintaining the manufacturer's specifications, it is a solution dedicated to professional engine control system repair.

Specifications and technical data

• SKU: A6461506679-1
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6461506679
• Substitutable numbers: A6461506679, A 646 150 66 79, 0281012228, 0 281 012 228
• Fuel type: Diesel
• Gearbox type: Automatic
• Category: ECUs & Computer Modules

Purpose and function of the engine control unit

The presented module belongs to the Electronic control modules and ECUs group and is responsible for the comprehensive management of the diesel engine in the Mercedes C-Class W203 generation. The ECU analyzes signals from sensors, controls fuel dosage, the injection system, and communicates with the automatic transmission, ensuring consistent operation of the entire powertrain.

In a diesel vehicle, the role of this module is crucial for:

• controlling combustion parameters and torque,
• proper communication with other control units in the vehicle network,
• maintaining stable operation of the power unit under various load conditions,
• coordinating operation with the automatic transmission regarding gear shifting.

Benefits of using an original ECU module

Using a factory-original control unit in a Mercedes W203 C200 CDI allows for maintaining consistency of software and calibration parameters with other vehicle systems. In practice, this means:

• preserving the factory performance characteristics of the diesel engine,
• proper cooperation with the automatic transmission without unwanted jerking,
• reduced risk of communication errors in the CAN network,
• easier diagnostics using Mercedes service testers.

A used OEM module is also a cost-effective solution while maintaining original build quality and fitment for the specific vehicle configuration.

Technical characteristics in the context of the powertrain

The control unit has been designed to work with a diesel engine, which is why its hardware architecture and software are adapted to the specifics of the diesel unit, including operation with high injection pressure and an advanced combustion management system. At the same time, the module is configured to work with an automatic transmission, which translates into:

• precise matching of torque to the current gear ratio,
• smooth gear changes thanks to data exchange between the engine ECU and the transmission controller,
• maintaining the appropriate driving modes provided by the manufacturer.

Such a configuration is particularly important for repairs where it is required to maintain the original powertrain control logic, without interfering with factory maps and algorithms.

Product condition and service application

The module is offered as a used item, making it an attractive solution for vehicle repairs where the factory ECU has been damaged or its replacement is necessary due to communication errors or engine starting problems. Choosing such a controller is of particular importance in the case of intensively used cars, where proven compatibility with the existing installation and the possibility of further diagnostics based on standard service procedures are what counts.

Expansion of the control system in a Mercedes

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 additional controllers, management modules, or auxiliary systems, check the available parts in the Mercedes electronic control modules and ECUs category.

For a comparison of how other manufacturers approach maintaining brand character in the context of original electronic components, it is worth reading the article Audi and pure emotion. How do used parts help maintain the brand's DNA?, which shows how important it is to use the right modules and components when repairing modern cars.