Mercedes W169 W245 200 M266.960 136HP Engine ECU Kit A2661534079 2 Keys Lock

Mercedes W169 W245 200 M266.960 136HP Engine ECU Kit 2 Keys Lock is a specialized electronic control unit designed for a gasoline engine paired with an automatic transmission. This component from the Electronic control modules and controllers category is responsible for precise engine management, ensuring stable parameters and proper cooperation with the drivetrain. Thanks to its factory design, the ECU maintains the original performance characteristics of the powertrain, which translates into predictable vehicle behavior.

Specifications and technical data

• SKU: A2661534079-1
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2661534079
• Substitutable numbers: A2661534079, A 266 153 40 79, A0014460240, A 001 446 02 40, 5WK90925, A1695451508, A 169 545 15 08, A1695452932, A 169 545 29 32
• Fuel type: Petrol
• Gearbox type: Automatic
• Category: ECUs & Computer Modules

Purpose and function of the engine controller

The presented control unit is dedicated to the gasoline engine in the Mercedes A-Class W169 series, A200 version, working with an automatic transmission. The ECU coordinates key engine operation processes, such as fuel injection, ignition timing, or response to sensor signals, and communicates with other vehicle modules responsible for transmission operation.

A properly selected controller is essential to maintain correct acceleration characteristics, smooth gear shifting, and stable idle operation. In the event of replacing a damaged ECU, using the correct module allows for restoring full functionality of the drivetrain without interfering with the engine's mechanics.

Benefits of using an original ECU module

Using an original control unit in a Mercedes W169 A200 ensures:

• retention of factory engine and automatic transmission control maps,
• proper cooperation with the electrical system and other vehicle modules,
• consistency of operating parameters with safety and comfort systems,
• possibility of diagnostics using standard Mercedes service tools.

For workshops and users, this means easier configuration, predictable repair results, and reduced risk of communication issues within the vehicle network. A properly selected controller helps avoid ECU memory errors, limp mode, and unstable engine operation.

Compatibility, replacement numbers, and OEM selection

This engine control unit has an assigned OEM part number and a set of interchangeable numbers, which facilitates the selection of the appropriate module for a specific vehicle configuration. The presence of multiple reference numbers allows it to be used as a replacement in various equipment variants within the same family of powertrains.

Before purchasing, it is recommended to verify compatibility by OEM number, reference numbers, or based on the vehicle's VIN. This approach minimizes the risk of installing an incorrect controller and speeds up the vehicle startup process after repair. In case of doubt, it is worth using the help of a specialist or catalog tools based on manufacturer data.

Operating characteristics with a gasoline engine and automatic transmission

The controller has been designed to work with a gasoline unit, which means matching control algorithms to the specifics of spark ignition, torque characteristics, and emission requirements for this type of engine. At the same time, the module takes into account cooperation with the automatic transmission, sending and receiving signals necessary for smooth gear changes.

This combination allows for:

• stable gear shifting under various loads,
• better throttle response,
• maintaining appropriate engine RPM depending on the driving mode,
• reduction of jerking and unwanted vibrations during gear changes.

Thanks to this, the vehicle maintains comfortable and predictable driving characteristics, in accordance with the manufacturer's specifications.

Condition, service application, and installation tips

The offered module belongs to the group of used electronic controllers, which makes it an attractive service solution for repairing vehicles used on a daily basis. Replacing a damaged ECU with a functional unit often allows avoiding costly mechanical engine repairs, focusing instead on the electronic and software layer.

During installation, it is recommended to:

• follow the manufacturer's guidelines for disconnecting and connecting the power supply,
• check the electrical installation for damage that may have led to the failure of the previous controller,
• perform adaptation or programming if required for the specific vehicle unit.

To better understand the specifics of installing and selecting used modules, it is worth reading the guide describing the practical aspects of working with automotive electronics: 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, powertrain management modules, or electronic systems working with the ECU, check the available parts in the Electronic control modules and controllers Mercedes category.