Mercedes W204 C200CDI BlueEFFICIENCY OM651.913 Engine ECU Kit A6511500126 Key

Mercedes W204 C200CDI BlueEFFICIENCY OM651.913 Engine ECU Kit is a specialized control set designed for diesel units with an automatic transmission. It is responsible for precise engine management, ensuring stable power characteristics, correct fuel dosing, and consistent operation with other electronic modules of the vehicle. This is a solution for users looking for a proven, factory-spec controller for professional repair or replacement.

Specifications and technical data

• SKU: A6511500126-1
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6511500126
• Substitutable numbers: A6511500126, A 651 150 01 26, A0054469240, A 005 446 92 40, A2075450108, A 207 545 01 08, A2045458132, A 204 545 81 32
• Fuel type: Diesel
• Gearbox type: Automatic
• Category: ECUs & Computer Modules

Purpose and function of the ECU kit

The presented kit belongs to the Electronic control modules and controllers group and is dedicated to the diesel engine in the Mercedes C-Class W204 generation, C200CDI version with the OM651.913 unit. Its task is to coordinate key engine operating parameters, such as injection timing, boost pressure, and cooperation with safety systems, which translates into predictable performance and correct response to load.

The version prepared for use with an automatic transmission ensures proper communication between the engine controller and the transmission control module, which is important for smooth gear shifting, powertrain refinement, and component durability.

Benefits of using an original controller kit

Using a complete engine computer as a kit reduces the risk of software matching issues and communication problems within the vehicle network. In practice, this means:

• maintaining factory diesel engine control logic,
• consistency of operation with safety and comfort systems,
• easier adaptation during service work,
• preserving the operating characteristics typical for the C200CDI OM651.913.

For workshops and users, this means a more predictable repair process and a lower risk of communication errors between modules after replacing the controller.

Technical characteristics in the context of the powertrain

A diesel engine combined with an automatic transmission requires precise torque management, especially regarding gear changes and transmission protection. The Engine ECU in this kit has been configured specifically for such a powertrain, which promotes:

• smooth acceleration without jerking,
• better cooperation with traction control and electronic stability systems,
• maintaining appropriate combustion parameters under typical road conditions.

Thanks to this, the kit is particularly valuable for professional controller replacement in vehicles used both in city traffic and on longer routes.

Product condition and use in service practice

The offered kit is a used item, which makes it an attractive cost-effective solution while maintaining factory control specifications. Such components are frequently chosen by workshops specializing in the Mercedes brand when it is necessary to replace the engine controller without interfering with the engine unit's construction.

In service practice, this type of kit allows for:

• restoring correct engine operation after a failure of the previous ECU,
• reducing costs compared to purchasing a new module,
• preserving the original electronic architecture of the vehicle.

Mercedes electronic control modules and controllers – expansion and repairs

If you are planning a comprehensive repair or upgrade of the engine area in your Mercedes and need other elements from the same group, such as transmission controllers, comfort modules, or safety system controllers, check the available parts in the Mercedes electronic control modules and controllers category.

Technical support and selection of used controllers

When selecting used electronic modules, it is worth knowing the differences between new parts and dismantled elements, as well as the specifics of engine controller operation in modern cars. Practical tips on using used electronic components, their quality, and cost-effectiveness can be found in the article New or used? A comparison of costs and quality of car parts.

Additionally, if you are interested in the broader context of engine controller and comfort module operation in premium vehicles, including BMW models, it is worth reading the guide describing repairs of iDrive systems and engine controllers using dismantled parts: Driving pleasure for years – how to take care of iDrive systems and electronic modules in BMW 3 and 5 series models.