[Schematics DRAFT](Hardware/Hellen/hellen128mercedes-a-schematic.pdf)

[Hellen128 Interactive Pinout](https://rusefi.com/docs/pinouts/hellen/hellen128/)

[Google Docs Pinout Spreadsheet](https://docs.google.com/spreadsheets/d/1I-lZKRajTiEGFUXdZpXEtKF2pymlOo-lPahy3cLMnl4)


Relevant? 

https://docs.google.com/spreadsheets/d/1JgGFJ8AggBFiKT_CQ1D6uYhaIsqeiH9RerxuVy1kp4Y/