Mercedes W169 W245 A180 B180 CDI Engine Control Module A6401507934 Automatic

The Mercedes W169 W245 A180 B180 CDI Engine Control Module is a factory electronic engine controller designed for vehicles with an automatic transmission. It is part of the Electronic Control Modules and Controllers group, engineered for precise integration with the CDI powertrain and the automatic gearbox system.

Specifications and technical data

• SKU: A6401507934-1
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6401507934
• Substitutable numbers: A6401507934, A 640 150 79 34, 0281015955, 0 281 015 955, A1695452308, A 169 545 23 08, A1695452932, A 169 545 29 32
• Gearbox type: Automatic
• Category: ECUs & Computer Modules

Application and Function in the Powertrain System

The presented engine controller is responsible for advanced management of the diesel engine's operation in Mercedes A-Class and B-Class models of the W169 and W245 generations, specifically the A180 CDI and B180 CDI versions. It controls, among other things, fuel delivery, injection parameters, engine ancillary operation, and interaction with the automatic transmission, which translates into stable operating characteristics, smooth acceleration, and predictable throttle response.

Thanks to its dedicated design for a specific powertrain configuration, the module ensures consistent communication within the vehicle's network, which is crucial for the proper functioning of safety and comfort systems.

Compatibility, Replacement Numbers, and OEM Selection

This controller is an original Mercedes component, meaning it maintains factory operating parameters and ensures full integration with the vehicle's electrical system. The part has an assigned OEM part number and a set of interchangeable numbers, which facilitate the selection of the correct variant for a specific engine and equipment version.

When selecting, it is recommended to verify compatibility by OEM number, reference numbers, and vehicle configuration (model, generation, engine type, transmission type). If in doubt, it is advisable to seek assistance from a specialist or consult a parts catalog to avoid issues with CAN network communication and potential reprogramming needs.

For users who want to better understand the principles of selecting used engine controllers and other electronic components, practical tips can be found in the Global Parts guide: Used Automotive Electronics Onboard – Why Choose Second-Hand ECU Modules and Sensors?

Integration with Automatic Transmission

The presented module is designed to work with an automatic transmission, which is of significant importance for the proper operation of the entire powertrain. The controller exchanges data with the transmission control unit, coordinating gear changes with the current engine load, rotational speed, and torque demand.

A correctly selected controller for an automatic version helps reduce jerking during gear changes, improves the smoothness of the drivetrain's operation, and reduces the risk of errors related to software or hardware configuration mismatches.

Product Characteristics and Benefits of Choosing OEM

As a component from the Electronic Control Modules and Controllers group dedicated to Mercedes, the module retains the factory hardware and software architecture, which facilitates integration with the vehicle's existing installation. This original solution avoids the need for wiring modifications, connector adaptations, or experiments with unreliable aftermarket parts.

Choosing a used OEM controller is often a sensible alternative to new parts, especially for older vehicle generations where the cost-to-functionality ratio is important. Additional arguments supporting this decision can be found in the article: 5 Reasons Why a Used OEM Part is a Better Choice Than an Aftermarket Replacement.

Condition, Installation, and Service Recommendations

The module is offered as a used part, which in practice means it comes from a vehicle disassembly and may require standard preparation steps by the workshop – including potential programming, immo coding, or adaptation to a specific car instance, according to manufacturer procedures.

During installation, it is recommended to:

• ensure stable power supply and proper condition of the electrical system,
• check grounds and connector connections before initial startup,
• perform computer diagnostics after installation to verify errors and operating parameters.

This approach minimizes the risk of secondary faults and allows for the full utilization of the installed controller's potential.

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 transmission controllers, check the available parts in the Mercedes Electronic Control Modules and Controllers category.