A new version of the natural-gas-powered Polo TGI BlueMotion will probably be introduced in the fourth quarter of 2018. Currently, the TGI is not available for ordering. The engine offered up to 2018 already features especially low emission values. This engine is automatically started in the natural gas mode (except at very low temperatures). If the natural gas (CNG) supply runs out, the dual-fuel system automatically switches to gasoline. Volkswagen is pushing ahead with the development of new natural gas powertrains which not only have low emissions but can also be operated on gas produced synthetically using renewable energies – solar, wind, hydropower and biomass.