AW: „ALT“ is an abbreviation for „Alternative“ and refers to a configurable function key, (see device user manual under “Misc Setup” p.61) where a specific function can be assigned via the Setup menu. This unit features a ALT soft key on the front panel and a ALT button field in the HMI. The following direct function assignments for the “ALT” button are available: (CAM/NAVI/EQ/Setup/BT-Music/BT/DISP/iPod/USB/HDMI/Android Auto/AV-IN/FM/DAB/CarPlay).