( 19.9 ) , Extra Urban 30.4 ( 9.3 ) , Combined 21.4 ( 13.2 ) . CO 2 emissions: 308 g/km. Model featured is a Mercedes-Benz SLS AMG Roadster at (price includes VAT, delivery, 12 months Road Fund Licence, number plates, new vehicle registration fee and fuel ) . Prices correct at time of going to print.