Ergonomics is the study of human performance and working conditions. Audi plans and designs the interiors of its cars according to the latest findings in this scientific discipline. Well-planned active safety and unimpaired comfort of the driver and passengers are requirements that all display and control functions that the driver must read or use to control the vehicle during operation must fulfil. Ergonomically optimised seats increase the comfort and well being of all vehicle occupants particularly on longer trips.