I updated the infotainment firmware on my #VW #Polo #MIB2 system (it is a Technisat Preh, there are multiple variants in the same car model!) - this is a somewhat cursed job as it *only* works via the SD-card (I tried with USB but got errors), then the ODB2 scanner has to be plugged in to clear off 2 codes (to confirm the software change)