Truma Diesel Combi D4E Heater & Boiler with InetX PaneThe Truma Combi d4e is the diesel and electric version of the ever popular truma combi 4e The diesel version is equipped with a high quality burner. therefore, it also heats reliably while driving At the camp site, you can simply switch over to electrical mode and run the heater with the 230v power supply, with no need for the vehicle battery Depending on the required output, choose between diesel, electric or mixed mode: in milder weather, set the