Natural Gas Technology (NGT) from Mercedes-Benz is a BlueEFFICIENCY technology with exceptionally low emissions and high cost savings potential. In the bivalent Sprinter NGT  version you can switch back and forth between natural-gas mode and petrol mode at the push of a button. Thanks to this "twin-track design" the drive system is suitable for operations in population centres and for interurban trips.
The monovalent version of the Sprinter NGT is considered a mono-fuel natural-gas vehicle. The mono-fuel Sprinter NGT earns points in particular in the urban environment. The petrol in the downsized fuel tank (< 15 l) only serves for starting purposes and as an emergency reserve. The switch is automatic and cannot be influenced by the driver. The mono-fuel Sprinter NGT today already meets the demanding European EEV (Enhanced Environmentally Friendly Vehicle) emissions standards.
Both NGT variants build a large lead when it comes to fuel costs: The savings when using natural gas (Compressed Natural Gas, CNG for short) over a comparable quantity of diesel fuel amount to about 25% in Germany, for example (as of January 2012). In Europe tax benefits, subsidies and other benefits, such as e.g. reduced insurance premiums, can differ depending on the country.