While other car manufacturers have been boasting about their green credentials, BMW has been acting. The “EfficientDynamics” package that has been offered on most of the company’s products since early last year has already dramatically cut official fuel economy and CO2 emission figures, and BMW now claims that it is on course to sell 700,000 cars fitted with the system in Europe this year.Compared to the official economy and emissions figures of older Beemers, that means EfficientDynamics models have theoretically saved over 33 million gallons of fuel and reduced CO2 emissions by 373,000 tonnes across the EU – with 54,000 tonnes saved in the UK. Obviously the actual reductions in consumption and emissions are likely to be lower, but there’s no doubt that BMW is considerably more advanced than most of its rivals. The Geneva show saw the debut of the BMW X5 Vision EfficientDynamics, which combines the existing technologies with a twin-turbocharged version of the company’s 2.0-litre diesel engine and “mild hybrid” electrical assistance, and which is claimed to be capable of delivering 43.5mpg and 172g/km despite an 8.9sec 0-62 mph time. Something very similar is likely to make it into production.