the  Audi A4  series.  Manufactured  at  Audi AG’s   Ingolstadt  plant in  Germany , they are, or have been available as a five- door  five- seat  Avant, Audi’s name for an  estate car (station wagon), a four-door five-seat saloon (sedan), and a two-door four-seat Cabriolet ( convertible ) version. Furthermore, their  internal combustion