The infotainment system in the Ford Mustang Cabriolet, gets the classic throwback treatment, complete with twin-cowled dashboard and toggle switches. However, whilst this may look great, how does it actually feel in comparison to rivals such as the BMW 4 series, or Mercedes C-Class Cabriolet. Are the buttons cheap and tacky? Will the sat nav send you on a journey of despair? What equipment comes as standard