Mercedes W205 C350e M274.920 279HP Engine ECU Kit A2749000800 Automatic

Mercedes W205 C350e M274.920 279HP Engine ECU Kit is a specialized electronic control module designed for a petrol engine unit paired with an automatic transmission. This component from the Electronic control modules and ECUs category is responsible for precise engine management, ensuring stable parameters and proper cooperation with the drivetrain. Thanks to its factory design tailored to a specific powertrain configuration, it is a solution that allows for efficient repair or replacement of a damaged ECU.

Specifications and technical data

• SKU: A2749000800
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2749000800
• Substitutable numbers: A2749000800, A 274 900 08 00, 0 261 S08 725, 0261S08785
• Fuel type: Petrol
• Gearbox type: Automatic
• Part type: Engine Control Unit (ECU)
• Category: ECUs & Computer Modules

Purpose and function of the ECU

The presented ECU is dedicated to the petrol engine unit paired with an automatic transmission in the Mercedes C-Class W205 generation, C350e version. As the central element of the engine management system, it supervises, among other things, fuel dosing, ignition, and cooperation with auxiliary equipment, which translates into proper dynamics, smooth operation, and compliance with factory control maps. By being matched to a specific powertrain configuration, the ECU ensures consistent communication with other vehicle modules, which is crucial when working with an automatic transmission. Proper selection of the ECU for the fuel type and transmission type minimizes the risk of errors, starting problems, or improper operation of onboard systems.

Benefits of using an original ECU

Using an original electronic control module in a Mercedes W205 C350e allows you to maintain the factory engine performance characteristics and compatibility with the vehicle's electrical system. This is particularly important in the case of advanced petrol units, where the ECU cooperates with many sensors and modules responsible for safety and driving comfort. The main advantages of this solution include:

• maintaining factory engine performance parameters,
• proper cooperation with the automatic transmission,
• consistent communication within the vehicle network with other modules,
• possibility of professional diagnostics and adaptation using factory service tools. Choosing a used, functional ECU is often an optimal cost-effective solution while maintaining high quality and compliance with factory specifications.

Application in a petrol system with an automatic transmission

The ECU has been designed to work with a petrol engine, which means that injection maps, ignition, and operating strategies are matched to the characteristics of this type of unit. At the same time, it is prepared for integration with an automatic transmission, which allows for smooth torque management, gear shifting, and protection of drivetrain components. Such a combination is particularly important in modern designs, where the engine ECU and transmission control form one coherent system. A properly selected control module reduces the risk of jerking, communication errors, or the transmission entering limp mode.

Condition and installation aspects

The offered item is in used condition, which in practice means the possibility of an economical vehicle repair while maintaining the manufacturer's original specifications. Before installation, standard service procedures should be considered, such as potential coding, adaptation to a specific vehicle, or synchronization with the immobilizer – in accordance with the requirements of the given model. Due to the advanced electronics, it is recommended that the installation and configuration be performed by a workshop with experience in Mercedes vehicles and appropriate diagnostic facilities. A properly performed installation allows for restoring full functionality of the drivetrain without interfering with the engine mechanics.

Mercedes electronic control modules and ECUs – expansion and selection

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 control modules, auxiliary controllers, or electronic management units, check the available parts in the Mercedes electronic control modules and ECUs category.

More about used automotive electronics

When choosing a used engine ECU, it is worth knowing what to pay attention to, how to verify compatibility, and when this form of repair is most cost-effective. Practical tips on selecting ECUs, comfort modules, and parking sensors can be found in the article A second life for electronics – when is it worth choosing used engine ECUs, comfort modules, and parking sensors?, which will help you consciously plan the repair of electronic systems in your car.