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The ECO SE models both feature weight-saving measures and engineers at the German manufacturer have been refining the powertrains to boost fuel consumption without having an impact on performance.
Significant strides have been made in terms of aerodynamics on the A 180 CDI ECO SE, with the model offering class-leading coefficient drag of just 0.26.
Both of the new production models, which will be available early next year, feature an improved energy recuperation system and are fitted with a lightweight fuel tank to save on weight.
CO2 emissions have been reduced in both eco model, with the A Class vehicle emitting just 92 g/km of CO2, a reduction of six per cent, while the B 180 CDI ECO SE emission have dropped to 98 g/km of CO2, a fall of nine per cent.
Both vehicles are free from road tax and the Benefit In Kind company car tax band for the A-Class is just 13 per cent, with qualification for 100 per cent capital allowance until 2015.
Lexus uncovers new 2014 CT 200h features
Lexus has been busy at international motor shows in recent months, displaying its latest design inno...