Mercedes-Benz has a new method of going green in the works.
After its emissions-reducing Bluetec diesel technology, its next big idea revolves around hybrids.
This S400 Hybrid features a 275bhp petrol V6 mated to an electric motor that will boost power to 295bhp.
It has CO2 emissions of 190g/km, but improves on the current equivalent, the S350, which does just 28mpg and emits 242g/km of carbon.
Two diesel hybrids are also being developed – the S300 Bluetec in 2010, boasting 52.3mpg and 142g/km, and the S400 Bluetec, with 261bhp, 48.7mpg and CO2 emissions of 154g/km.