Mercedes ML W164 280CDI 4-Matic OM642 Engine Control ECU Kit A6421502277 Automat

The Mercedes ML W164 280CDI 4-Matic OM642 Engine Control Unit Automatic is a specialized component from the Electronic Control Modules and Units group, designed for precise management of the Diesel engine's operation in conjunction with an automatic transmission. It is responsible for advanced control of the OM642 engine parameters, ensuring stable operation of the powertrain in the ML W164 model with 4-Matic drive.

Specifications and technical data

• SKU: A6421502277-2
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6421502277
• Substitutable numbers: A6421502277, A 642 150 22 77, 0281013971, 0 281 013 971, A1645450908, A 164 545 09 08
• Fuel type: Diesel
• Gearbox type: Automatic
• Category: ECUs & Computer Modules

Purpose and Function of the Control Unit

The engine control unit in this Mercedes model is responsible for coordinating the operation of the diesel engine and its interaction with the automatic gearbox. It analyzes signals from sensors, manages fuel injection, injection timing, and other key parameters to maintain appropriate dynamics, smooth running, and drive efficiency. In a 4-Matic vehicle, a properly functioning control module is crucial for smooth torque transfer and predictable vehicle behavior in various road conditions.

Compatibility and Interchangeable Numbers

The offered control unit belongs to the group of Mercedes OEM parts, which means it maintains factory control logic and full integration with the vehicle's electrical system. The module has a dedicated part number and a set of interchangeable numbers, which facilitates the selection of the correct variant for a specific ML W164 280CDI 4-Matic configuration. This allows for matching the control unit to both the engine version and the installed automatic transmission, without the need for universal or adapted solutions.

Technical Characteristics and Role in the Powertrain

The control unit is designed to work with the OM642 Diesel engine, meaning it supports specific injection maps, boost pressure, and operating strategies in various driving modes. In conjunction with the automatic transmission, the control unit coordinates the throttle response, gear shift points, and drive behavior under load, which translates into predictable and comfortable vehicle handling.

In practice, a correctly selected control module allows for:

• maintaining stable idle speed and smooth acceleration,
• ensuring consistent operation of the engine and automatic gearbox,
• preserving the factory operating characteristics of the OM642 unit in the ML W164 280CDI 4-Matic.

Condition, Origin, and Service Application

The component is offered as a used engine control unit, which is an attractive service solution in case of failure of the original module or the need for its replacement for diagnostic reasons. Choosing an original, used control unit from the same family helps maintain consistency with the Mercedes factory electrical architecture, reducing the risk of communication problems within the vehicle network.

The module is suitable for both standard repairs and for restoring full powertrain functionality after mechanical or electrical damage. In many cases, it is a cost-effective alternative to purchasing a new control unit, while maintaining the original system operating logic.

Assistance with Selection and Additional Information

When selecting a control unit, it is crucial to compare the OEM part number and interchangeable numbers with the vehicle's data, as well as to consider the fuel type and transmission type. If in doubt, it is advisable to consult an automotive electrician or a service specializing in the Mercedes brand to confirm the module's compatibility with the specific ML W164 280CDI 4-Matic configuration.

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

To compare the approach of premium manufacturers to original electronic modules and the impact of used components on maintaining the brand's DNA, it is worth reading the article on our blog: Audi and pure emotion. How used parts help maintain the brand's DNA?.