Mercedes C219 CLS 320 642.920 224HP Engine Unit ECU Kit A6421503972 Key Lock

Mercedes C219 CLS 320 642.920 224HP Engine Unit ECU Kit is a set from the Electronic control modules and controllers category, designed for a diesel unit paired with an automatic transmission. The kit ensures consistent control of the diesel engine's operation, enabling proper communication with other vehicle systems and stable powertrain performance.

Specifications and technical data

• SKU: A6421503972-1
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6421503972
• Substitutable numbers: A6421503972, A 642 150 39 72, 0281014323, 0 281 014 323, A0355457732, A 035 545 77 32, A2115452308, A 211 545 23 08
• Fuel type: Diesel
• Gearbox type: Automatic
• Category: ECUs & Computer Modules

Purpose and function of the kit

The presented engine computer kit is dedicated to the Mercedes CLS C219 generation model with the 642.920 engine unit producing 224 HP. The component is responsible for advanced control of diesel engine parameters, including fuel dosing, boost control, and cooperation with the automatic transmission, which translates into smooth driving characteristics.

By using an original module from the same family of controllers, full compatibility with the vehicle's factory electrical architecture is maintained, which facilitates diagnostics, adaptation, and subsequent maintenance.

Benefits of using an original engine computer

Using an original control kit in a Mercedes CLS C219 allows for maintaining factory injection maps and the logic of engine protection systems. This is particularly important for diesel units, where precise control of injection pressure and auxiliary equipment affects refinement, fuel consumption, and exhaust emissions.

By choosing this kit, you gain:

• consistency of software and hardware within the engine control system,
• maintenance of proper cooperation with the automatic transmission,
• the ability for correct coding and adaptation using factory diagnostic tools,
• reduction of the risk of communication errors in the vehicle network.

Technical characteristics and compatibility

As an element from the Electronic control modules and controllers category, the kit has been designed to operate in the demanding environment of a premium car engine bay. The module's construction takes into account the specifics of the diesel unit and cooperation with the automatic transmission, which is crucial when replacing a controller in vehicles with such a powertrain.

Before purchasing, it is recommended to verify compatibility by OEM number and interchangeable numbers in the specification tab, as well as to compare the engine and transmission configuration with your vehicle. This approach minimizes the risk of starting problems, CAN communication errors, and the need for additional installation modifications.

Condition, origin, and practical application

The offered kit is a used item, sourced from the dismantling of a Mercedes vehicle. This type of solution is often chosen for repairs of advanced engine electronics because it allows for a significant cost reduction compared to a new controller, while maintaining the original hardware specification.

In practice, this type of kit is used both in the event of a failure of the original engine computer and for more extensive powertrain repairs where it is required to match a set of electronics to a specific vehicle configuration. A correctly selected and coded module allows for the restoration of full functionality of the power unit without interfering with the engine mechanics.

Support with selection and additional materials

Selecting the right controller for a Mercedes requires taking into account the engine code, fuel type, and transmission type. In case of doubt, it is worth using the guide on used automotive electronics, which discusses selection by OEM number, hardware and software compatibility, and the most frequently asked questions related to installation. Detailed information can be found in the article Used automotive electronics on board – why is it worth choosing second-hand ECU modules and sensors?.

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, engine management modules, or related electronic systems, check the available parts in the Mercedes electronic control modules and controllers category.