Fuel autonomy: diesel fuel is uniform worldwide and available 24/7, all year long. A very precise monitoring of fuel supplies is possible via the fuel-gauge. Heating autonomy: heating while driving is allowed worldwide. By supplying the heater with diesel out of the vehicle fuel tank, there is no need to search for fitting bottle connectors or hassle of exchanging gas bottles in foreign countries. More space: gas bottles in motorhome can be reduced as they do last longer anyway and all Webasto heaters can be mounted outside the vehicle. This leads to significantly more space inside the motorhome. Less weight: in winter, more than 80% of LPG gas is needed only for interior heating. By using diesel operated heaters, the LPG gas bottles can be downsized to one single 5 kg bottle and up to 35 kg of additional load can be gained.