Opt for the base Premium trim as it offers a long list of standard features and moreover it is mechanically similar to rest of the trims. Add optional packages as per your requirement. If you seek the best of technology and features like vehicle control via a smartphone app then you can choose the top of the line Prestige trim.
2018 Audi A5 Convertible Prices
Premium Plus quattro 2dr Convertible AWD (2.0L 4cyl Turbo 7AM)