Mercedes W204 C200 CDI OM646.811 136HP ECU Engine Module A6461502572 Automatic

The Mercedes W204 C200 CDI OM646.811 136HP ECU Engine Module Automatic is an original part from the Electronic Control Modules and Controllers group, designed for a diesel engine paired with an automatic transmission. This used ECU ensures factory engine operating logic, maintaining the correct parameters for the specific drivetrain configuration.

Specifications and technical data

• SKU: A6461502572-1
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6461502572
• Substitutable numbers: A6461502572, A 646 150 25 72, A0054461740, A 005 446 17 40
• Fuel type: Diesel
• Gearbox type: Automatic
• Category: ECUs & Computer Modules

Intended Use and Function of the Engine Controller

The presented ECU is dedicated to the diesel engine in the Mercedes C-Class W204 generation, specifically the C200 CDI version. It is responsible for precise management of the powertrain's operation, including fuel injection, diesel engine ignition control, auxiliary equipment interaction, and communication with other vehicle systems.

The module is configured to work with an automatic transmission, which is crucial for proper data exchange between the drivetrain and the transmission control unit. This ensures optimal driving comfort, smooth gear changes, and stable operational parameters.

Benefits of Using an Original ECU

Using an original engine controller in a Mercedes W204 C200 CDI maintains compatibility with the vehicle's factory electronic architecture. This means:

• correct communication within the vehicle network (CAN, system buses),
• retention of factory control maps for the diesel engine,
• consistency with safety and comfort systems.

A used module from this product group is a good solution for repairs where restoring the original configuration without altering the electrical system is important. Factory matching to the specific engine and automatic transmission version minimizes the risk of compatibility issues.

Selection, Compatibility, and Installation

When selecting an ECU for a Mercedes W204 C200 CDI, it is recommended to verify compatibility using the OEM number and interchangeable part numbers, as well as matching the fuel type and transmission type. Proper selection helps avoid communication errors, engine starting problems, or incorrect automatic transmission operation.

During installation, it is necessary to consider the programming and adaptation procedures used in Mercedes vehicles, including potential coding for a specific car. A correctly selected and configured ECU module allows for the restoration of full powertrain functionality after the failure of the previous controller.

Product Condition and Service Application

The offered controller is from the aftermarket and is intended for service applications in Mercedes C-Class vehicles with a diesel engine and automatic transmission. It is a practical solution for repairs requiring the replacement of a damaged module without the need to purchase a new unit.

Combined with proper diagnostics and appropriate parameter selection, such a module enables efficient and economical repair of the engine control system, while maintaining the factory operating logic of the powertrain.

If you are planning a comprehensive repair or upgrade of the engine control area in your Mercedes and need other parts from the same group, such as engine controllers, transmission control modules, or electronic auxiliary equipment control units, check the available parts in the Mercedes Electronic Control Modules and Controllers category.

If you want to learn more about how to consciously choose used engine controllers and other electronic modules, what to look for when selecting by OEM number, and what the installation and configuration process involves, read the guide: Used Automotive Electronics Onboard – Why Choose Second-Hand ECU Modules and Sensors?