Mercedes X253 GLC 250 M274.920 4-Matic Engine ECU Unit Module A2749002900

Mercedes X253 GLC 300e M274.920 4-Matic Engine Computer ECU A2749002900 is a factory electronic control unit designed for the GLC 300e hybrid powertrain with the M274.920 engine and 4Matic drive. The original ECU module ensures proper cooperation of all engine components, drivetrain, and onboard systems, guaranteeing stable operation and predictable vehicle responses. This is a solution for users expecting consistency with the factory electrical architecture and Mercedes software.

Specifications and technical data

• SKU: A2749002900-1
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2749002900
• Substitutable numbers: A2749002900, A 274 900 29 00, 0261S19944, 0 261 S19 944
• Category: ECUs & Computer Modules

Purpose and Function of the Engine Control Unit

The presented engine computer belongs to the group of Electronic Control Modules and Controllers and is responsible for the comprehensive management of the M274.920 unit in the Mercedes X253 GLC 300e with 4-Matic drive. The module supervises, among other things, fuel delivery, ignition, accessory operation, and communication with other control units in the vehicle, which translates into proper dynamics, smooth operation, and safety of the powertrain.

Thanks to its factory design, the ECU is optimized for the specific hybrid configuration of the GLC 300e, allowing for compliance with original control maps and the logic of cooperation with other vehicle systems.

Advantages of Using an Original Mercedes ECU

Using an original engine computer in the GLC 300e offers a number of practical technical benefits:

• maintaining the factory operating characteristics of the engine and 4-Matic drive,
• consistency with the vehicle's electrical system and communication network,
• possibility of proper diagnostics using dedicated service tools,
• reducing the risk of communication errors between control modules.

As a component from the Electronic Control Modules and Controllers group, the control unit is designed for precise cooperation with other modules in the vehicle, which is particularly important in modern hybrid systems.

Product Characteristics and Installation

The offered engine computer is from the Mercedes brand and is an OEM part, which facilitates fitting with factory wiring harnesses, connectors, and mounting brackets. This simplifies the replacement process in a specialized service center or automotive electronics workshop, minimizing the need for installation modifications.

Due to the specific nature of ECU controllers, it is recommended to verify compatibility with the specific vehicle configuration before installation and prepare for potential adaptation or programming according to Mercedes service procedures. This approach allows for full utilization of the controller's potential and reduces the risk of improper powertrain operation.

Condition and Practical Application

The product is offered as a used engine control unit, which is an attractive cost alternative to purchasing a new module while maintaining the factory design and purpose. This type of solution is often chosen for post-accident repairs, electronic damage, or ECU communication problems in vehicles used daily.

A properly selected and prepared engine computer allows for restoring correct powertrain operation, clearing errors stored in the control unit's memory, and restoring full functionality of systems cooperating with the ECU.

Related Modules and Service Knowledge

In modern premium vehicles, such as the Mercedes GLC, the electronic architecture is similar to solutions used in other premium segment brands. It is worth familiarizing yourself with practical tips regarding working with control modules, their diagnostics, and selecting parts from disassembly – this is described in more detail in the article on iDrive systems and control units in BMW 3 and 5 series: how to care for electronic modules and engine control units using parts from disassembly.

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 engine control units, powertrain management modules, or other ECUs, check the available parts in the category Mercedes Electronic Control Modules and Controllers.