Mercedes W204 C220 CDI 170HP OM646.811 Engine ECU Kit A6461503734 Automatic

Mercedes W204 C220CDI 170HP OM646.811 Engine Control Module Kit A6461503734 Automatic is a complete engine control unit set designed for the diesel version with an automatic transmission. This item from the Electronic Control Units and Controllers group ensures precise engine operation management, supporting stable power, smooth running, and correct functioning of associated systems. By maintaining the original powertrain electronics architecture, the kit allows for efficient restoration of the vehicle's full functionality.

Specifications and technical data

• SKU: A6461503734-3
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6461503734
• Substitutable numbers: A6461503734, A 646 150 37 34, A0054467440, A 005 446 74 40, A2075450108, A 207 545 01 08
• Fuel type: Diesel
• Gearbox type: Automatic
• Part type: Engine Control Unit (ECU)
• Category: ECUs & Computer Modules

Purpose and Role of the Engine Module

The presented engine module kit is dedicated to the OM646.811 diesel engine in the Mercedes C-Class W204 generation, specifically the C220CDI version with 170 HP, working with an automatic gearbox. As the central control element of the powertrain, it is responsible for coordinating injection, boost pressure, combustion parameters, and communication with other control units in the vehicle. A correctly selected module of this type is crucial for maintaining proper dynamics, fuel economy, and the correct operation of safety and comfort systems.

Benefits of Using an Original Kit

Using a complete engine module kit matched to the specific diesel engine configuration and automatic gearbox reduces the risk of software compatibility and vehicle network communication issues. Proper matching to the powertrain allows for the preservation of factory operating characteristics, which translates to:

• stable starting and smooth engine operation,
• proper cooperation with the automatic gearbox,
• correct handling of driving modes and driver assistance functions,
• maintenance of exhaust emission parameters consistent with the factory configuration.

For the user, this means more predictable vehicle behavior, reduced risk of control unit errors, and easier diagnostics in the future.

Technical Characteristics and Matching

The module comes from a vehicle powered by Diesel fuel and configured with an automatic transmission, which is important when selecting a control unit for a specific powertrain version. The kit belongs to the Electronic Control Units and Controllers group, allowing it to integrate with the vehicle's communication bus and cooperate with other control units responsible for, among others, the gearbox, traction systems, or safety systems. The product is offered as a used part, enabling economical repair while maintaining the original electronics architecture.

Professional Selection and Reference Numbers

This engine module has an assigned OEM part number and a set of interchangeable numbers, which facilitates professional matching to a specific vehicle instance. When selecting, it is recommended to verify compatibility by part number, engine configuration, fuel type, and gearbox type to avoid startup or control unit network communication problems. If in doubt, it is advisable to seek assistance from a specialist or a service center with appropriate diagnostic software.

If you want to deepen your knowledge on flawlessly matching used electronic components and other parts to your car, a guide describing practical selection principles and the importance of OEM numbers will be helpful – check out how to professionally select used car parts, saving time and nerves.

Integration with Other Modules and System Expansion

In case of extensive powertrain repair, it is worth considering the entire control system, not just a single control unit. 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 auxiliary control units, engine management modules, or additional control units, check the available parts in the Mercedes Electronic Control Units and Controllers category.

Technical Support and Automotive Electronics Knowledge

Although the described product concerns the Mercedes brand, issues related to maintaining the vehicle's character through the correct selection of original electronic modules are common across many manufacturers. If you are interested in how properly selected control units and modules affect a car's behavior and driving experience, it is worth familiarizing yourself with material demonstrating this using another premium brand as an example – see the article Audi and pure emotion. How used parts help maintain the brand's DNA? to better understand the significance of original modules in modern cars.