Mercedes SLK R172 250CDI OM651.930 204HP Engine Module ECU Kit A6519007500 Key

Mercedes SLK R172 250CDI OM651.930 204HP Engine Module ECU Kit is an advanced electronic set designed for the OM651.930 204HP unit with an automatic transmission. The kit ensures consistent engine control operation in diesel vehicles, enabling professional repair of the control system without the need for programming from scratch.

Specifications and technical data

• SKU: A6519007500-20
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6519007500
• Substitutable numbers: A6519007500, A 651 900 75 00, A2129056801, A 212 905 68 01
• 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 category and is dedicated to the Mercedes SLK R172 250 CDI model with a diesel engine and automatic transmission. Using a complete module with a key allows for maintaining the integrity of the immobilizer system, engine control, and other related functions, which significantly facilitates the installation process in the vehicle.

In the case of the OM651.930 unit, precise matching of the controller to the drivetrain configuration is crucial. Using the correct ECU module helps maintain proper engine operating parameters, such as fuel dosage, boost control, or cooperation with the automatic transmission.

Benefits of using a complete module with a key

The engine module kit with a key is particularly beneficial in situations where the original controller has been damaged or there are issues with the immobilizer. This complete solution allows you to:

• maintain the compatibility of the engine electronics with the diesel drivetrain configuration,
• limit the scope of programming to the necessary minimum,
• speed up the diagnostic and vehicle startup process after repair,
• maintain stable cooperation with the automatic transmission.

For workshops specializing in the Mercedes brand, such a kit provides a practical base for professional engine control system repair, especially in vehicles where electronics have been damaged due to accessory or wiring failures.

Application in the OM651.930 diesel engine

The OM651.930 engine is a popular Mercedes diesel unit, where a properly selected ECU module has a direct impact on refinement, performance, and fuel consumption. Using the correct controller:

• supports precise injection control in the diesel engine,
• enables proper cooperation with engine protection systems,
• ensures compatibility with factory operating strategies of the automatic transmission.

Combined with properly functioning engine accessories, such a module allows for restoring parameters close to factory settings, which is important both from the perspective of engine durability and vehicle comfort.

Product condition and installation aspects

The module comes from the category of used components, which makes it an attractive cost-effective solution while maintaining the manufacturer's original specifications. For installation, it is recommended that the work be performed by a workshop with experience in Mercedes electronics, which will allow for proper adaptation of the kit to the specific vehicle.

Before installation, it is worth performing a full diagnostic of the drivetrain to rule out other causes of faults, such as problems with the electrical system, engine accessories, or the automatic transmission itself. A properly selected and installed ECU module with a key can significantly shorten repair time and reduce the risk of the problem returning.

Expanding knowledge and selecting engine electronics

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 controllers, comfort modules, or ECU units, check out the available parts in the Mercedes electronic control modules and controllers category.

For a better understanding of how properly selected used electronic components affect the character and behavior of a premium class car, it is worth reading the article on our blog: Audi and emotions in their purest form – how used modules and controllers help maintain the brand's DNA. Although the text concerns a different brand, it well illustrates the importance of original electronics in maintaining the vehicle's factory properties.

If you are interested in a broader context of operating Mercedes diesel units, including issues related to accessories and the durability of popular engines, the following entry may also be helpful: Reliability under the star sign – how to take care of Mercedes-Benz engine accessories, which discusses a practical approach to selecting proven parts in the drivetrain.