Mercedes W211 E220 CDI 646.821 170HP Engine ECU Kit A6461505072 Ignition + Key

Mercedes W211 E220 CDI 646.821 170HP Engine Computer A6461505072 Set is a specialized kit from the Electronic Control Modules and Controllers group, designed for the diesel engine version with an automatic transmission. The set ensures consistent control of the diesel engine's operation, enabling the restoration of proper drivetrain function and stable driving parameters.

Specifications and technical data

• SKU: A6461505072-1
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6461505072
• Substitutable numbers: A6461505072, A 646 150 50 72, A2115452308
• Fuel type: Diesel
• Gearbox type: Automatic
• Category: ECUs & Computer Modules

Intended Use and Compatibility with E220 CDI Unit

The presented engine computer set has been prepared for the Mercedes E-Class W211 generation, specifically the E220 CDI version with 170 HP and engine code 646.821. The controller's design is adapted to the specifics of the diesel engine, allowing for proper management of injection, boost, and operating parameters under various load conditions.

The solution is tailored for cooperation with a Diesel fuel-based drivetrain, meaning the control algorithms are optimized for the torque characteristics, fuel consumption, and smooth operation typical of modern diesel engines.

Integration with Automatic Transmission

The engine computer in this set is designed to work with an automatic transmission, which is crucial for smooth gear changes and overall vehicle dynamics. A correctly selected controller enables precise data exchange between the engine and the gearbox, resulting in stable RPMs, appropriate shift points, and driving comfort.

Such matching is particularly important for diesel engines, where torque management must be closely coordinated with the automatic transmission's operation to avoid jerks, delayed responses, or undesirable emergency modes.

Set Characteristics and Service Application

As an item from the Electronic Control Modules and Controllers category, the engine computer set serves as the central point of the powertrain management system. In service practice, it is primarily used for:

• resolving engine starting problems or unstable operation,
• clearing errors related to controller network communication,
• restoring full functionality after damage to the original module.

The used nature of the component allows for economical repair while maintaining the vehicle's original electronic architecture. A properly selected set enables the recreation of the factory control logic, which is particularly important in cars where compliance with the original manufacturer's configuration is paramount.

Benefits of Installing an Original Control Set

Using an original engine computer set in a Mercedes W211 E220 CDI offers a range of practical benefits:

• Vehicle Electronics Cohesion – maintaining compatibility with the factory controller architecture minimizes the risk of software conflicts.
• Stable Diesel Engine Operation – proper control of injection and boost contributes to smooth engine operation and predictable throttle response.
• Proper Automatic Transmission Cooperation – adaptation to the automatic transmission supports smooth gear changes and driving comfort.
• Reasonable Repair Costs – using a used, functional set allows for cost savings compared to purchasing a new module.

Technical Support and Additional Materials

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 controllers, management modules, or control systems, check the available parts in the Mercedes Electronic Control Modules and Controllers category.

To better understand how original electronic modules affect a car's driving characteristics and behavior, it's worth reading our guide on preserving the brand's factory DNA – you can find it here: Audi and Pure Emotion – How Used Modules and Controllers Help Maintain the Brand's Character.