BMW 3 Series Forum - Technical Talk on the BMW E46
I have just come across this cable on fleabay.. it lists the 320D with the EDC16 ecu as readable and writable so it looks like there is finally a low cost solution to downloading and upliading maps to the EDC16 ECU
Latest MPPS V13.02 Chip Tuning Read/ Write Flash EDC16 EDC17 | eBay
It claims...