Mercedes R171 M272.942 SLK300 231HP Engine Module ECU Kit A2729000300 Key

Mercedes R171 M272.942 SLK300 231HP Engine Module ECU Kit is a specialized set from the Electronic control modules and controllers category, designed for vehicles with a gasoline engine and automatic transmission. This solution allows for a consistent replacement of the engine control unit along with the associated immobilizer components, which facilitates the restoration of full functionality of the drivetrain in Mercedes cars.

Specifications and technical data

• SKU: A2729000300-1
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2729000300
• Substitutable numbers: A2729000300, A 272 900 03 00, 0261209496, 0 261 209 496, A2115452308, A 211 545 23 08
• Fuel type: Petrol
• Gearbox type: Automatic
• Category: ECUs & Computer Modules

Application and purpose of the ECU kit

The presented Mercedes R171 M272.942 SLK300 231HP Engine Module ECU Kit is dedicated to versions with the M272.942 unit with 231 HP, powered by gasoline and working with an automatic transmission. The complete control module with a key is a practical solution when replacing a damaged controller, dealing with immobilizer problems, or when it is necessary to transfer complete engine electronics between vehicles with a compatible configuration.

By maintaining the consistency of electronic components, it is possible to limit time-consuming programming procedures, which in many cases translates into more efficient diagnostics and faster vehicle startup after repair.

Technical benefits for the M272.942 engine

The kit has been designed with the specifics of the M272.942 gasoline engine in mind, which requires precise control of fuel dosage, ignition, and cooperation with the automatic transmission. A properly selected ECU module:

• supports the proper operation of the injection and ignition system in a gasoline engine,
• enables correct communication with the automatic transmission,
• ensures compatibility with the factory electronic architecture of the Mercedes vehicle,
• facilitates the maintenance of stable operating parameters of the power unit.

For workshops specializing in the Mercedes brand, such a kit is a convenient service solution, allowing for faster restoration of vehicle efficiency after an engine electronics failure.

Characteristics of the used module

The offered set comes from the group of used electronic control modules, which is an attractive cost alternative to new components. With proper selection by OEM number and vehicle configuration, a fully functional solution can be obtained while maintaining control over the repair budget.

To maximize the potential of used electronics, it is worth paying attention to hardware and software compatibility, as well as the correct installation and adaptation procedure in the vehicle. A detailed discussion of these issues can be found in the Global Parts guide: Used automotive electronics – second-hand ECU modules and sensors, which explains step-by-step selection by VIN/OEM, compatibility issues, and the most common service questions.

Support for selection and expansion of Mercedes electronics

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 transmission controllers, check the available parts in the Mercedes electronic control modules and controllers category.

The selection of the appropriate ECU kit with a key for a specific gasoline engine and automatic transmission configuration should always be supported by verification by OEM number and vehicle data. Such an approach minimizes the risk of incompatibility, shortens installation time, and allows you to fully utilize the capabilities of the offered control kit in your Mercedes R171.