Mercedes W205 C200 274.920 184HP Engine Control Unit ECU A2749000800 Manual

Mercedes W205 C200 274.920 184HP Engine Control Unit ECU is a specialized module from the Electronic control modules and controllers category, designed for precise management of the powertrain. The controller supports the petrol engine in a manual transmission configuration, ensuring stable operation, correct fuel metering, and proper communication with other vehicle systems.

Specifications and technical data

• SKU: A2749000800-4
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2749000800
• Substitutable numbers: A2749000800, A 274 900 08 00, A2749010600, A 274 901 06 00, 0261S08785, 0 261 S08 785
• Fuel type: Petrol
• Gearbox type: Manual
• Category: ECUs & Computer Modules

Purpose and function of the engine controller

The presented engine computer has been designed for Mercedes C-Class W205 generation models in the C200 version with a petrol unit. As the central element of the powertrain control system, it is responsible for coordinating fuel injection, ignition, and cooperation with safety and comfort systems. This ensures that the engine maintains proper operating characteristics, and the throttle response remains predictable and consistent.

The controller is adapted for use with a manual transmission, which is crucial when selecting the appropriate module for a specific vehicle configuration. Using the correct ECU helps avoid communication issues within the vehicle's network and errors related to software incompatibility.

Benefits of using an original Mercedes module

Choosing an original controller from the Electronic control modules and controllers category ensures high compatibility with the factory electrical installation and engine operating parameters. The module is prepared for integration with Mercedes diagnostic systems, which facilitates adaptation and potential coding in the vehicle.

The main advantages of using this type of ECU include:

• maintaining factory petrol engine performance characteristics,
• proper cooperation with the manual transmission,
• stable communication with other controllers in the vehicle,
• possibility of full diagnostics and configuration using professional service tools.

Operational characteristics and installation

The offered engine computer is a used part, which allows for an economical repair of the control system while maintaining the manufacturer's original specifications. Before installation, it is recommended to verify compatibility by part number and vehicle configuration, as well as to perform appropriate adaptation procedures in a workshop equipped with diagnostic tools.

Due to the advanced electronics and integration with safety systems, the installation and programming of the controller should be carried out by a specialized service center. This helps avoid issues with engine starting, ECU memory errors, or improper operation of accessories.

Selecting a used ECU and technical knowledge

When choosing a used engine controller, it is crucial to match the module to the specific equipment version, fuel type, and transmission type. Proper selection reduces installation time and the risk of additional costs associated with hardware or software incompatibility.

If you want to deepen your knowledge about selecting and installing such components, how to check compatibility, and practical aspects of installation, check out our guide: Used automotive electronics on board – why is it worth choosing second-hand ECU modules and sensors?

Expanding the control system in your Mercedes

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 additional controllers, engine management modules, or electronic units working with the ECU, check the available parts in the Mercedes electronic control modules and controllers category.

For a comparison of the cost-effectiveness of purchasing used versus new parts, as well as an analysis of cost versus quality, the following guide material may also be helpful: New or used? A comparison of costs and quality of car parts.