Mercedes CLC CL203 220 CDI Engine Control Unit Module A6461503934 Automatic

The Engine Control Module for Mercedes CLC CL203 220 CDI with Automatic Transmission is a specialized component from the Electronic Control Modules and Controllers group, designed for precise engine management. This used ECU ensures factory control logic, maintaining the correct parameters for the diesel engine and its cooperation with the automatic gearbox.

Specifications and technical data

• SKU: A6461503934
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6461503934
• Substitutable numbers: A6461503934 0281016185, A 646 150 39 34, 0 281 016 185, ŁS
• Gearbox type: Automatic
• Category: ECUs & Computer Modules

Purpose and Function of the Engine Controller

The presented ECU module is dedicated to the Mercedes CLC CL203 220 CDI model equipped with an automatic transmission. It is responsible for coordinating key engine operating parameters, such as fuel injection quantity, boost pressure, and injection corrections, as well as for proper communication with other vehicle controllers.

By preserving the original electronic architecture, the controller enables stable powertrain operation, correct gear shifting, and compatibility with the vehicle's factory software. This solution is particularly beneficial for professional repairs or restoring the factory configuration.

Benefits of Using an Original ECU Module

Using an original electronic control module in the Mercedes CLC CL203 220 CDI allows for:

• maintaining compatibility with the factory CAN network and other vehicle controllers,
• preserving the manufacturer's intended engine and automatic transmission operating strategies,
• minimizing the risk of communication errors and adaptation issues,
• facilitating diagnostics using standard service tools.

For workshops and users, this means a more predictable installation process and fewer potential programming complications.

Condition, Verification, and Selection by Numbers

The module comes from the secondary market, making it an economical solution while maintaining an original-equivalent construction. Before installation, verification of compatibility by OEM part number and interchangeable numbers is recommended, as well as matching the software version and vehicle configuration.

To select the appropriate controller for a specific Mercedes unit, it is advisable to use the VIN and compare the hardware and software designations with the currently installed module. This approach reduces the risk of incompatibility and speeds up the adaptation process in the vehicle.

Cooperation with Automatic Transmission

The presented controller is designed for versions with an automatic transmission, which is significant for the logic of torque control and gear shifting strategies. A correctly selected ECU module:

• supports smooth gear shifting in various driving modes,
• coordinates engine load with gearbox operation,
• helps maintain proper powertrain performance.

This ensures the vehicle retains the driving characteristics intended by the manufacturer, which is important for both comfort and component durability.

Technical Support and Selection of Used Electronics

If you want to better understand how to safely choose used engine controllers and other vehicle electronics, including selection principles by VIN, OEM, and hardware-software compatibility, it is worth reading the guide: Used Automotive Electronics – Second-Hand ECU Modules and Sensors. The article discusses practical aspects of installation, programming, and common questions related to the aftermarket electronics.

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 controllers, comfort modules, or other ECUs, check the available parts in the category Mercedes Electronic Control Modules and Controllers.