Does not work on Audi Q3 2014, with 3g mmi plus.En checking more closely the 5v power supply connector friend is ok (so load as ok), not possible to control the USB key or this or because the hdd recognizes the mmi taken as a 3.5mm audio source because there is a resistance value 1khom (1.8kohm ipod recognition). I do not know the value of resistance for the case usb for the mmi can control hdd or usb?