Mercedes W169 W245 A180 B180 CDI Engine Control Module A6401507934 Automatic

Mercedes W169 W245 A180 B180 CDI Engine Control Module is a specialized electronic control unit designed to work with diesel engines and automatic transmissions. This component from the Electronic control modules and controllers group is responsible for precise engine management, ensuring stable driving characteristics and proper communication with other vehicle systems. Thanks to its original Mercedes origin, the module maintains correct operating parameters and is matched to the car's electrical architecture.

Specifications and technical data

• SKU: A6401507934
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6401507934
• Substitutable numbers: A6401507934 0281015955, A 640 150 79 34, 0 281 015 955
• Gearbox type: Automatic
• Category: ECUs & Computer Modules

Purpose and function of the controller

The presented engine control unit is designed for Mercedes compact class models of the W169 and W245 series in A180 CDI and B180 CDI versions equipped with an automatic transmission. Its task is to coordinate key engine operating parameters, such as fuel dosing, boost control, and cooperation with engine protection systems. A properly selected ECU module allows for maintaining the consistency of the drivetrain, reducing the risk of CAN communication errors, and ensuring correct response to sensor signals.

Compatibility with automatic transmission

The controller has been configured to work with an automatic transmission, which is important for both gear shifting smoothness and engine safety. Appropriate maps and control logic take into account the loads resulting from the automatic transmission characteristics, thanks to which the drivetrain maintains stable RPM, and the throttle response remains predictable. A properly selected ECU module for an automatic version minimizes the risk of incorrect shifting, limp mode, or errors related to engine and transmission synchronization.

Application of the used engine control unit

A used engine control unit for a Mercedes A180/B180 CDI is a practical solution in situations where the existing module has suffered electronic damage, has been flooded, or there are persistent communication errors. Choosing an original module from dismantling allows for maintaining the factory installation architecture while reducing repair costs compared to purchasing a new unit. In many cases, after proper matching and configuration, the controller can be effectively adapted to a specific vehicle, restoring the correct operation of the engine and automatic transmission.

Selection by part numbers and ECU configuration

When selecting an engine control unit for a Mercedes, it is crucial to compare the OEM part number and interchangeable numbers, as well as pay attention to the compatibility of hardware and software versions. In workshop practice, identification by VIN number and parameters stored in the controller's memory is often used to avoid problems with the immobilizer, injection system, or communication with other modules. A properly selected and configured ECU reduces the need for additional installation modifications, which translates into shorter repair time and lower risk of secondary faults.

If you want to better understand how to safely choose used ECU modules, what to look for regarding hardware and software compatibility, and what the adaptation process in a vehicle looks like, check out the Global Parts guide: Used automotive electronics on board – why is it worth choosing second-hand ECU modules and sensors?

Benefits of choosing an original Mercedes module

The original Mercedes engine control unit ensures the maintenance of factory engine operating parameters and full integration with other vehicle systems, such as ABS, ESP, or comfort modules. This makes it possible to maintain consistent diagnostics, correct error handling, and predictable vehicle behavior in various operating conditions. For workshops and users, this means easier fault identification, better cooperation with diagnostic testers, and lower risk of problems resulting from incompatible replacements.

If you are planning a comprehensive repair or modernization of the engine area in your Mercedes and need other elements from the same group, such as engine controllers, ECU modules, or electronic management units, check out the available parts in the Mercedes electronic control modules and controllers category.