A four-way exhaust gas valve for selectively coupling and decoupling a latent heat reservoir into/from an exhaust gas stream of an internal combustion engine, comprising: a permanent inlet adapted to be connected to an exhaust gas outlet of the internal combustion engine; a permanent outlet adapted to be connected to a silencer; a selectable outlet adapted to be connected to a latent heat reservoir; a selectable inlet adapted to be connected to the latent heat reservoir; and a valve flap pivotable between a first sealing position and a second sealing position, wherein the valve flap is optionally plane, the valve flap for switching between a first mode of operation in which exhaust gas entering through the permanent inlet is directly guided to the permanent outlet, and a second mode of operation in which exhaust gas entering through the permanent inlet is discharged through the selectable outlet, and exhaust gas re-entering through the selectable inlet is discharged through the permanent outlet; wherein a pivot axis of the valve flap is arranged between the permanent inlet and the selectable inlet, and between the permanent outlet and the selectable outlet, and transects a valve body of the four-way exhaust gas valve; characterized in that a first flow direction of the exhaust gas in one of the inlets or outlets, respectively, lies in a different plane than flow directions in the remaining inlets and outlets, respectively, wherein the flow directions in the remaining inlets and outlets, respectively, are mutually coplanar; wherein the different plane is non-parallel to the plane of the other flow directions; and wherein a deflection angle between the flow direction of the exhaust gas in the permanent inlet and the flow direction in the permanent outlet is less than 40°. a permanent inlet adapted to be connected to an exhaust gas outlet of the internal combustion engine; a permanent outlet adapted to be connected to a silencer; a selectable outlet adapted to be connected to a latent heat reservoir; a selectable inlet adapted to be connected to the latent heat reservoir; and a valve flap pivotable between a first sealing position and a second sealing position, wherein the valve flap is optionally plane, the valve flap for switching between a first mode of operation in which exhaust gas entering through the permanent inlet is directly guided to the permanent outlet, and a second mode of operation in which exhaust gas entering through the permanent inlet is discharged through the selectable outlet, and exhaust gas re-entering through the selectable inlet is discharged through the permanent outlet; wherein a pivot axis of the valve flap is arranged between the permanent inlet and the selectable inlet, and between the permanent outlet and the selectable outlet, and transects a valve body of the four-way exhaust gas valve; characterized in that a first flow direction of the exhaust gas in one of the inlets or outlets, respectively, lies in a different plane than flow directions in the remaining inlets and outlets, respectively, wherein the flow directions in the remaining inlets and outlets, respectively, are mutually coplanar; wherein the different plane is non-parallel to the plane of the other flow directions; and wherein a deflection angle between the flow direction of the exhaust gas in the permanent inlet and the flow direction in the permanent outlet is less than 40°.