Mercedes W207 E200 BE M274.920 Engine Unit Module ECU Kit A2749000900 Key

Mercedes W207 E200 BE M274.920 Engine Unit Module ECU Kit is a specialized, used controller designed for gasoline engines, engineered for precise engine management. This original module from the Electronic control modules and controllers group ensures consistency with the vehicle's factory electrical architecture and stable communication with other onboard systems. It is the ideal solution for users looking to restore proper engine performance without compromising on compatibility.

Specifications and technical data

• SKU: A2749000900-1
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2749000900
• Substitutable numbers: A2749000900, A 274 900 09 00, 0261S08395, 0 261 S08 395, A2189054701, A 218 905 47 01
• Fuel type: Petrol
• Category: ECUs & Computer Modules

Function and application of the engine controller

The presented ECU module is responsible for advanced control of the gasoline engine's operation, including fuel injection, ignition timing, and interaction with sensors and actuators in the engine bay. This allows the powertrain to operate under stable conditions, maintaining proper dynamics, smooth performance, and emission control.

In the case of Mercedes vehicles, using an original controller is particularly important due to the complex electronic communication network. The ECU module must communicate correctly with other systems, such as safety systems, the transmission, or comfort modules; therefore, choosing the right component has a direct impact on the reliability of the entire powertrain.

Benefits of using an original Mercedes ECU module

Using a factory controller in a model with the M274 engine offers a range of practical benefits:

• preservation of factory performance parameters for the gasoline unit,
• consistency with diagnostic software used in service centers,
• proper communication with other electronic modules in the vehicle,
• reduced risk of errors resulting from mismatched aftermarket replacements.

For users who expect predictable vehicle behavior and want to avoid adaptation issues, an original module from the Mercedes range is a safe and technically sound solution.

Product characteristics and fitment

The offered controller belongs to the Electronic control modules and controllers group, meaning it was designed as a central component in the engine management system. Its construction takes into account the specifics of gasoline engines, including requirements for precise mixture control and cooperation with modern emission control systems.

Before purchasing, it is recommended to verify the module's compatibility with your specific vehicle configuration using the vehicle's identification data and the information provided in the technical specifications. This ensures you select a controller that, after proper configuration and potential programming, will work with the electrical system without the need for additional modifications.

Product condition and installation aspects

The module is offered as a used component, which allows for an economical restoration of the engine control system while maintaining original manufacturing quality. In practice, this means the ability to replace a damaged ECU with a factory equivalent that, after proper installation and software matching, can continue to operate in the vehicle for a long time.

Due to the nature of engine controllers, it is recommended that installation and configuration be performed by a workshop with experience in Mercedes electronics and the appropriate diagnostic tools. This helps avoid communication issues within the vehicle's network and ensures the module is correctly assigned to the specific vehicle.

More information and related products

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

If you want to better understand when choosing a used engine controller is technically and economically justified, check out our guide: The second life of electronics – when is it worth choosing used engine controllers, comfort modules, and parking sensors?. You will find practical tips on selecting and using used automotive electronics there.

For those thinking long-term about the value of their car, the following material describing the impact of original components on the vehicle's resale value may also be helpful: Original used parts vs. car resale price – how not to lose money?. This makes it easier to make an informed decision about investing in a factory ECU module.