Maybe someone can tell me what I'm doing wrong. My head unit is MST2_US_VW_P0628D/MU 0751, 3Q0035844A. I'm trying to update to P0635D/MU 0757 to fix some random lock ups/stalls for 10+ seconds then quickly rushes through all touch inputs, and phantom inputs that I've ruled out is not the touchscreen itself.
I have an 8gb micro sd card in a standard sd card adapter. Partition table set to MBR/msdos type and a single partition formatted as fat32.
I've extracted the contents of MST2_US_VW_P0635D_MU0757.7z to the root of the sd card with nothing else.
However, when I place the sd card in to the head unit, it does a quick scan but doesn't see the update. When I go in to the Update menu in service mode, the sd card is grayed out.