The reduction in unsprung masses not only improves handling dynamics and agility, but also ride comfort and tyre grip.

ENGADGET: Visualized: Mercedes-Benz SLS AMG E-Cell bares all

Watch Autumnwatch from Friday, 2 October to Friday, 20 November, 2009 at 9pm every Friday on BBC Two followed by Autumnwatch Unsprung at 10pm.

BBC: Cambridgeshire - Autumnwatch: Get closer to nature