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Siemens MSS5x ECU DME Flashing for BMW S54, S62, euro S50MSS50, MSS52, MSS54, MSS54HP, MSS54HPCSL
Requires FT232RL chipset cable. https://www.ebay.com/itm/284709097537
BimmerTuningTools is a recommended MSP developer. All purchases, software download, activation and support are dealt with on the BTT website.