Hi,
Fuel figures are set by the Govt. in the Uk so hyundai cant really be accused of posting false figures. My trajet is manual , brand new and like yours doesnt match the fuel figures.
I achieved 28 on a long run and recently only got as high as 37 (48 listed). Its a heavy wagon at 2 tons with only a 2 litre so this may have something to do with it. My Volvo was well down on mpg compared with the published figures. Whos kidding who? Cheers Nige