The invention in particular of a car, in particular for an internal combustion engine, a fluid, in particular fuel, oil, hydraulic system 10, in particular a filter system, and a heating device for water or urea solution having a heating device 26 for at least one fluid It describes a 26. At least one heating chamber (14) has at least one inlet 18 and at least one outlet for the fluid. At least one heating chamber (14) has at least a heating element (32) with one electrical operating the two support bodies (28, 30) is disposed between the at least one of the at least one support body (28, 30) the contact portion (40, 52) and is electrically and thermally contacted. Fluid to the side away from the two support bodies (28, 30) at least one internal volume region 58 and the support body (28, 30) at least one, at least one internal volume area (58) in between heading, it may flow through the at least one external volume regions (62, 64) on the outside. At least one of the at least one enlarged portion of the interior volume region 58, the two support distance between the body (28, 30) has at least one contact portion (40, at its peripheral side at least the facing at least one enlarged portion greater than the distance between the support body (28, 30) in the region of 52).