MPG and emissions are all to do with how you drive the car.... always ignore the official figures - if you knew how they test them you'd realise they arent worth looking at....
you should always buy a car that suits your driving style and the type of driving you are going to do. Top Gear Highlighted this when they proved the M3 was more economical than a Prius..... The prius was driven around the TG track and the M3 followed it at the same pace, the M3 was a lot more economical being driven in that scenario....
Why official MPG figures need a reality check
Agreed, but they should give an indication and as they're calculated using the same route.
New C Coupe figs are still showing possible MPG figs of the 1.8L C180 as exactly the same MPG as the 3.5L C350 on the combined cycle. Driving style aside, if they're driven cautiously, surely they should both return a broadly similar figure in real life?