Mercedes W211 E220CDI OM646.821 170HP Engine ECU Kit A6461505572 Automatic

Mercedes W211 E220CDI OM646.821 170HP Engine ECU Kit is a precisely selected electronic set designed for the 170 HP version with an automatic transmission. The product comes from the Electronic control modules and controllers group, which guarantees factory integration with the vehicle's electrical system and proper cooperation with other car systems.

Specifications and technical data

• SKU: A6461505572-1
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6461505572
• Substitutable numbers: A6461505572, A 646 150 55 72, A0044461540, A 004 446 15 40, 28114675, A0355457732, A 035 545 77 32, A2115452308, A 211 545 23 08
• Gearbox type: Automatic
• Category: ECUs & Computer Modules

Application and compatibility with Mercedes W211 E220 CDI

The presented ECU kit is intended for Mercedes E-Class W211 generation models with the 170 HP OM646.821 diesel engine, configured with an automatic transmission. A properly selected engine controller ensures correct handling of injection, turbocharging, auxiliary equipment operation, and communication with other modules in the vehicle, such as the transmission control module or comfort systems.

By using an original module from the Electronic control modules and controllers group, compatibility with the Mercedes factory electrical architecture is maintained, which minimizes the risk of CAN communication errors and engine start-up problems after installation.

Characteristics of the ECU kit for automatic transmission

The kit has been configured for compatibility with an automatic transmission, which is crucial for the proper operation of functions such as:

• smooth gear shifting according to engine load maps,
• proper response to kick-down and driving modes,
• torque coordination during gear changes,
• correct communication with the transmission control module.

Choosing a controller dedicated to the automatic version limits the need for additional programming and reduces the risk of software incompatibility with the vehicle configuration.

Benefits of choosing a used ECU module

Choosing a used ECU kit for a Mercedes W211 E220 CDI is a solution that allows for a significant reduction in repair costs while maintaining factory specifications. An original module from the secondary market has already been verified in real operating conditions, which provides a practical advantage over some low-quality replacements.

To better understand how to safely select and install a used engine controller, it is worth reading the Global Parts guide: Used automotive electronics on board – why is it worth choosing second-hand ECU modules and sensors?. The article explains, among other things, issues of selection by OEM numbers, hardware and software compatibility, and typical questions regarding installation.

Professional selection by numbers and configuration

This ECU kit has a dedicated OEM part number and a set of interchangeable numbers, which allows for precise verification of compatibility with a specific Mercedes vehicle. When selecting, it is recommended to compare the markings with the original controller and the engine and transmission configuration to ensure full hardware and software compliance.

In case of doubt, it is worth using the vehicle's VIN and consulting the selection with the technical department, which further increases the chance of trouble-free installation and correct operation of all systems.

Expanding the control system in a Mercedes

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 additional controllers, comfort modules, or safety system controllers, check the available parts in the Electronic control modules and controllers Mercedes category.

For users interested in a broader approach to the operation and servicing of Mercedes power units, the guide on taking care of engine accessories in popular C-Class and E-Class models may also be helpful: Reliability under the star sign – how to take care of engine accessories in popular Mercedes-Benz C-Class and E-Class models?. This makes it easier to plan further service work and select appropriate electronic components.