Heater with integrated electric supplementary heating

The device is assembled of a coolant container (2) with an inlet (2a) and an outlet (2b) located on top of the radiator (3) comprising several ducts held with their upper ends in a bottom element (11) at the container (2). An additional heating unit (5) with an L-shaped contact sheet (11) is positioned at the rear of the radiator (3). The plug housing (7) is located on top of an L-shaped lid (6) provided with three downwards pointing elements (8) forming a clip-connection with the vertical section of the contact sheet (11).