Mercedes W204 C350 M276.957 306HP Engine Control Unit ECU Kit A2769004900 Key

Engine Control Unit (ECU) with Key for Mercedes W204 C350 M276.957 306 HP is a precisely matched set from the Electronic Control Modules and Controllers group, designed for advanced management of the powertrain. The set ensures consistency of electronic components responsible for engine control, facilitating professional repair or replacement of the control system in Mercedes C-Class W204 vehicles with the M276.957 engine.

Specifications and technical data

• SKU: A2769004900
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2769004900
• Substitutable numbers: A2769004900, A 276 900 49 00, 0261S07800, 0 261 S07 800, A2079057101, A 207 905 71 01
• Category: ECUs & Computer Modules

Purpose and Function of the ECU Set

The presented control set is dedicated to Mercedes C-Class W204 models, specifically the C350 version with the M276.957 306 HP gasoline engine. The kit includes the Electronic Control Unit (ECU) along with a matching key, which ensures the consistency of the immobilizer system and vehicle security logic.

A set configured in this way allows service specialists to efficiently replace the engine control system without the need for deep intervention in the vehicle's software, which in many cases reduces repair time and minimizes the risk of starting problems.

Benefits of Using an Original Mercedes Control Module

An original electronic control module from this series is designed for the specific M276.957 engine, thus maintaining the factory logic for ignition, fuel injection, and engine ancillary control. For the user, this means:

• maintaining engine performance characteristics consistent with the manufacturer's specifications,
• proper cooperation with other vehicle systems (including the gearbox, safety systems, and onboard electronics),
• stable powertrain operating parameters after the controller replacement.

An additional advantage is the inclusion of the key in the set, which simplifies integration with the existing vehicle security system and may reduce the scope of necessary programming compared to installing a standalone, "blank" controller.

Category Characteristics: Electronic Control Modules and Controllers

Products in the Electronic Control Modules and Controllers category are responsible for processing signals from sensors, controlling actuators, and communicating within the vehicle's electronic network. For the ECU unit for Mercedes W204 C350, maintaining compatibility with the vehicle's electrical architecture and proper software configuration is crucial to:

• ensure correct communication over the vehicle's data buses,
• maintain full functionality of driver assistance systems,
• minimize the risk of diagnostic errors after installation.

Selecting a component from the same controller family, intended for a specific engine and model, is key to trouble-free operation after repair.

Product Condition and Service Application

The offered ECU set with key is a used part, making it an attractive solution for workshops and users seeking an economical alternative to new components while maintaining original manufacturer specifications. This type of set is primarily used for:

• repairs after damage to the original engine controller,
• cases of ECU communication problems in the vehicle,
• advanced service work related to powertrain electronics.

Before installation, a full vehicle diagnosis and verification of the set's compatibility with the specific vehicle configuration are recommended, which is a standard procedure in professional Mercedes electronics services.

Expanding the Control System in Mercedes

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 additional controllers, auxiliary modules, or ancillary management units, check the available parts in the Mercedes Electronic Control Modules and Controllers category.

To better understand how original electronic modules influence a car's character and on-road behavior, it's worth reading the article on our blog: Audi and Pure Emotion. How Used Parts Help Maintain Brand DNA?. Although it concerns a different brand, it effectively illustrates the importance of using original electronic components in modern cars.