MMCFlash Chip tuning Software - 67 Module, BMW Bosch MED17/EDC17 E series ( Identification, Virtual Reading, Map Area Writing, Checksum Correction (Digital Signature Bypass), Error Reading / Deleting ) Software Activation From MMC Flash. Specs: Manufacturer: MMC Flash   Tabs:  CAN - for the Master ECU; Slave - for writing the second ECU (Slave); Stock - for getting back to the stock without using the patch to keep the original CVN, for both Master and Slave ECUs; Repair - for emergency situations, for both Master and Slave ECUs.