Mercedes W204 C220CDI 646.811 170HP Engine ECU Kit Ignition + Key A6461502072

Mercedes W204 C220CDI 646.811 170HP Engine ECU Kit Ignition + Key is a solution designed for vehicles with the 646.811 170HP engine unit, equipped with an automatic transmission and powered by diesel. This kit allows for a coherent replacement of electronic components responsible for engine operation and start authorization, which significantly simplifies the repair process.

Specifications and technical data

• SKU: A6461502072-1
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6461502072
• Substitutable numbers: A6461502072, A 646 150 20 72, A0054461840, A 005 446 18 40, A2045450908, A 204 545 09 08
• Fuel type: Diesel
• Gearbox type: Automatic
• Category: ECUs & Computer Modules

Purpose and function of the ECU kit

The presented Mercedes W204 C220CDI 646.811 170HP Engine ECU Kit Ignition + Key is dedicated to the Mercedes C-Class W204 generation in the C220 CDI version with a 646.811 170HP diesel engine. Integrating the ECU with ignition system components and a matched key allows for maintaining the consistency of the immobilizer system, which is particularly important in modern electronic systems.

This type of solution is especially useful when replacing a damaged ECU in vehicles with an automatic transmission, where proper communication between the ECU, ignition module, and other controllers is crucial for the smooth operation of the drivetrain.

Benefits of using a complete kit

Using a complete Mercedes W204 C220CDI 646.811 170HP Engine ECU Kit Ignition + Key brings a number of practical service benefits:

• consistency of electronic components responsible for starting and engine control,
• reducing the need for immobilizer programming and key coding,
• maintaining proper cooperation with the drivetrain in the automatic transmission version,
• the ability to restore full vehicle functionality after an ECU failure.

For workshops and users, this means shorter repair times and a reduced risk of communication problems between electronic modules in the vehicle.

Application in vehicles with diesel engines and automatic transmissions

The discussed kit is intended for vehicles with a diesel engine, which means its software and configuration are adapted to the specifics of the diesel unit – including injection control, turbocharging, and engine protection systems. Additionally, compatibility with the automatic transmission ensures that the ECU takes into account cooperation with the transmission module, which is important for smooth gear shifting and the proper operation of driving modes.

Such matching is especially important in the case of vehicles experiencing communication errors between the engine controller and the transmission module – replacing it with a properly configured kit allows for restoring stable operation of the drivetrain.

Category characteristics and integration with vehicle electronics

The product belongs to the Electronic control modules and ECUs group, which are components responsible for managing the operation of key vehicle systems. In the case of the Mercedes W204 C220 CDI, the Mercedes W204 C220CDI 646.811 170HP Engine ECU Kit Ignition + Key works with other onboard modules via communication buses, supervising, among other things, starting, engine operating parameters, and driver authorization.

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 controllers, comfort modules, or engine management units, check the available parts in the Mercedes electronic control modules and ECUs category.

Product condition and use of used parts

The offered kit comes from the secondary market, which allows for an economical restoration of the engine control system's efficiency while maintaining the manufacturer's original specifications. Used electronic components of this type are frequently chosen for professional repairs because they allow for matching to the specific engine and equipment version of the vehicle.

For those interested in a broader context of using original, used components in premium cars, an article describing how to preserve the brand's character during repairs and upgrades may be helpful – more information can be found in the material Audi and emotions in their purest form. How do used parts help maintain the brand's DNA?.