Mercedes W245 B160 M266 Engine Control ECU Kit A2661539779 Key Lock Automatic

Mercedes W245 B160 M266 Engine Control ECU Kit Key Lock Automatic is a practical solution for workshops and users who need a verified, used set for a vehicle with an automatic transmission. The set belongs to the Electronic control modules and controllers group, which allows for seamless integration with the factory wiring and vehicle electronics.

Specifications and technical data

• SKU: A2661539779-1
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2661539779
• Substitutable numbers: A2661539779, A 266 153 97 79, A0024463140, A 002 446 30 40, 5WK90966, A1695452932, A 169 545 29 32, A1695451908, A 169 545 19 08
• Gearbox type: Automatic
• Category: ECUs & Computer Modules

Application and function of the ECU kit

The presented engine control kit is designed for the Mercedes B-Class W245 model in the B160 version with an automatic transmission. The set includes an electronic engine control unit (ECU) along with immobilizer components – the key and ignition lock – which makes it easier to match to a specific vehicle without the need for time-consuming programming from scratch.

A kit configured in this way allows for the restoration of proper powertrain operation in the event of a failure of the original controller, communication problems in the CAN network, or damage related to the immobilizer. By maintaining the consistency of electronic components, the risk of software conflicts and startup errors is minimized.

Benefits of using an original control module

Choosing a used, original ECU kit with a key and ignition lock for the Mercedes B-Class W245 B160 provides several significant advantages:

• Factory compatibility – the controller comes from the same family of modules, which guarantees proper cooperation with the electrical system, instrument cluster, and other controllers in the vehicle.
• Immobilizer system consistency – the set contains elements that are software-linked, which facilitates installation and reduces the need for additional coding.
• Time savings in the workshop – a ready-to-use set shortens the process of diagnostics and vehicle startup after replacing a damaged module.
• Automatic transmission matching – the controller configuration is prepared for operation with an automatic transmission, which is crucial for smooth gear shifting and the proper operation of the entire powertrain.

Vehicle integration and installation aspects

The ECU kit with key and ignition lock is intended for installation in a vehicle equipped with an automatic transmission, which requires following the appropriate procedure for adaptation to the existing installation. The workshop performing the installation should pay attention to:

• correct connection of electrical harnesses to the engine controller,
• maintaining the correct sequence of steps when replacing the ignition lock and key,
• verifying communication with other modules from the Electronic control modules and controllers group after starting the vehicle.

This approach helps to limit the risk of errors appearing in the controller's memory and ensures stable operation of the engine and automatic transmission.

Why it is worth choosing a used ECU kit for a Mercedes

A used engine controller kit with a key and ignition lock is a reasonable choice for drivers and service centers that want to combine functionality with cost control. The original module from dismantling retains factory operating parameters while avoiding problems typical of cheap replacements of uncertain origin. In the case of vehicles such as the Mercedes B-Class W245 B160, where engine and automatic transmission electronics are tightly integrated, using the appropriate set has a direct impact on driving comfort and powertrain reliability.

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 engine controllers, comfort modules, or transmission controllers, check the available parts in the Mercedes Electronic control modules and controllers category.

Knowledge and best practices when working with automotive electronics

When selecting and installing electronic modules, it is worth using the experience gained from servicing other makes and models. The principles regarding work with immobilizer systems, engine controllers, or comfort modules are similar regardless of the vehicle manufacturer. Therefore, materials describing repairs in other popular cars may be useful – for example, how to safely replace controllers and modules in premium class cars. More practical tips can be found in the article Driving pleasure for years – how to take care of iDrive systems and electronic modules in BMW 3 and 5 series models using parts from dismantling?, which discusses good practices for working with electronics and controllers using another brand as an example, but in a way that is also useful when servicing a Mercedes.