Bosch MED17.7.3 - TC1797 | FAQ & Support

Bosch MED17.7.3 - TC1797

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Concerns vehicles from

Further Information on Bosch MED17.7.3 - TC1797

About the Control Unit

The Bosch MED17.7.3 is an advanced Engine Control Unit (ECU) belonging to the Bosch Motronic generation, specifically designed for modern gasoline engines with Direct Injection. Powered by the high-performance Infineon TriCore TC1797 processor, this module manages critical functions such as ignition timing, turbocharger pressure, and fuel injection strategies. It is most commonly found in Mercedes-Benz vehicles equipped with the M270, M274, M276, and M278 engine families.

Common Car Models

Mercedes-Benz A250 (W176)
Mercedes-Benz C250 (W204/W205)
Mercedes-Benz E400 (W212)
Mercedes-Benz CLA 250 (C117)
Mercedes-Benz GLA 250 (X156)
Mercedes-Benz SLK 250 (R172)

Technical Concepts Explained

TriCore TC1797: The primary 32-bit microcontroller architecture used in this ECU, known for its high-speed processing capabilities and integrated safety features for engine management.
Checksum: A mathematical verification value used to ensure the integrity of the data stored within the ECU flash memory. Any modification to the file requires a new checksum calculation to allow the engine to start.
Bench Mode: A communication method that allows reading and writing the ECU's data by connecting directly to the external pins without the need to open the casing or unsolder components.