Mercedes R171 SLK350 272.969 305HP Engine ECU Kit A2721531692 Key Lock Automatic

Mercedes R171 SLK350 272.969 305HP Engine ECU Kit is a complete, used solution designed for the petrol engine unit marked 272.969 with 305HP and an automatic transmission. Thanks to the factory configuration for a specific engine and transmission type, this engine control unit kit allows for an efficient replacement of a damaged module without the need for costly adaptation from scratch.

Specifications and technical data

• SKU: A2721531692-1
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2721531692
• Substitutable numbers: A2721531692, A 272 153 16 92, A0034467640, A 003 446 76 40, 0261209376, 0 261 209 376, A0375456132, A 037 545 61 32, A2115452308, A 211 545 23 08
• Fuel type: Petrol
• Gearbox type: Automatic
• Category: ECUs & Computer Modules

Purpose and compatibility

The presented Mercedes R171 SLK350 272.969 305HP Engine ECU Kit is dedicated to the 272.969 305HP petrol engine, working in conjunction with an automatic transmission. Integrating the engine controller with the key and lock ensures consistency with the vehicle's factory security system, which facilitates the restoration of full powertrain functionality after an electronics failure.

The product belongs to the Electronic control modules and controllers group, which means it is responsible for precise management of the power unit's operation, including combustion parameter control, cooperation with the automatic transmission, and communication with other modules in the vehicle.

Function of the ECU kit with key and lock

The set including the engine controller, key, and lock is particularly useful in situations where there has been damage to the engine electronics, issues with the immobilizer, or incompatibility between modules in the vehicle. Using a ready-made kit allows you to:

• maintain the consistency of the security and ignition system,
• minimize the risk of communication errors between the controller and other modules,
• speed up the diagnostic and vehicle startup process after repair.

Thanks to being matched to the petrol engine and automatic transmission, the kit supports the proper operation of the powertrain under typical operating conditions as well as during dynamic driving.

Benefits of using an original control module

The original module from dismantling ensures the preservation of the factory operating characteristics of the power unit. In practice, this means:

• stable engine operation across the full rev range,
• proper cooperation with the automatic transmission,
• compliance with the vehicle's factory electrical architecture.

Choosing a used, original Mercedes R171 SLK350 272.969 305HP Engine ECU Kit is often a more predictable solution than experimenting with uncertain replacements, especially in advanced constructions such as the Mercedes SLK350 R171.

Condition and service application

The item comes from dismantling and is intended for service applications, such as replacing a damaged controller, repairing startup issues, or restoring communication in the vehicle's electronic network. The used ECU kit allows for reducing repair costs while maintaining the factory specification and system logic.

Before installation, it is recommended to verify the compatibility of the vehicle configuration and perform professional diagnostics to confirm that the cause of the problems is indeed the engine controller or related security system components.

More electronic solutions and service knowledge

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, comfort modules, or power unit management systems, check the available parts in the Electronic control modules and controllers Mercedes category.

To deepen your knowledge about the operation of electronic modules, their diagnostics, and the use of parts from dismantling in advanced control systems, it is worth reading the article describing a practical approach to repairing controllers and multimedia systems in premium cars: 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?