A temperature control arrangement for a motor vehicle, comprising - a coolant line arrangement for the circulation of coolant, comprising a receiving-heat exchanger for heat exchange between the coolant and a drive unit of the motor vehicle and a heating-heat exchanger for heat exchange between the coolant and an air flow that can be introduced into a passenger compartment of the motor vehicle, and - a refrigerant line arrangement for the circulation of refrigerant, comprising a compressor, a condenser/gas cooler connected downstream of the compressor in the flow direction of the refrigerant, an expansion element connected downstream of the condenser/gas cooler in the flow direction of the refrigerant, and an evaporator connected downstream of the expansion element in the flow direction of the refrigerant, wherein the coolant line arrangement and the refrigerant line arrangement are thermally coupled with one another by means of a coupling-heat exchanger designed as a coolant/refrigerant-heat exchanger, and wherein the coolant line arrangement has two coolant sub-circuits, namely - an engine cooling sub-circuit, comprising the receiving-heat exchanger, and - a cab heating sub-circuit, comprising the coupling-heat exchanger and the heating-heat exchanger, which are separated from one another in a first switching position of a switching valve arrangement and can be operated separately, characterized in that - the coupling-heat exchanger and the condenser/gas cooler are connected in series with each other in the refrigerant line arrangement and - the engine cooling sub-circuit in addition has a discharge-heat exchanger for the heat exchange between the coolant and an external heat sink, which in a second switching position of the switching valve arrangement, in which the two sub-circuits (210, 220) of the coolant line arrangement are connected to one another, is designed as a common element of both sub-circuits (210, 220) and - that in the second switching position of the switching valve arrangement the discharge-heat exchanger is connected downstream both of the receiving-heat exchanger as well as of the heating-heat exchanger in the flow direction of the coolant. - a coolant line arrangement for the circulation of coolant, comprising a receiving-heat exchanger for heat exchange between the coolant and a drive unit of the motor vehicle and a heating-heat exchanger for heat exchange between the coolant and an air flow that can be introduced into a passenger compartment of the motor vehicle, and - a refrigerant line arrangement for the circulation of refrigerant, comprising a compressor, a condenser/gas cooler connected downstream of the compressor in the flow direction of the refrigerant, an expansion element connected downstream of the condenser/gas cooler in the flow direction of the refrigerant, and an evaporator connected downstream of the expansion element in the flow direction of the refrigerant, wherein the coolant line arrangement and the refrigerant line arrangement are thermally coupled with one another by means of a coupling-heat exchanger designed as a coolant/refrigerant-heat exchanger, and wherein the coolant line arrangement has two coolant sub-circuits, namely - an engine cooling sub-circuit, comprising the receiving-heat exchanger, and - a cab heating sub-circuit, comprising the coupling-heat exchanger and the heating-heat exchanger, which are separated from one another in a first switching position of a switching valve arrangement and can be operated separately, characterized in that - the coupling-heat exchanger and the condenser/gas cooler are connected in series with each other in the refrigerant line arrangement and - the engine cooling sub-circuit in addition has a discharge-heat exchanger for the heat exchange between the coolant and an external heat sink, which in a second switching position of the switching valve arrangement, in which the two sub-circuits (210, 220) of the coolant line arrangement are connected to one another, is designed as a common element of both sub-circuits (210, 220) and - that in the second switching position of the switching valve arrangement the discharge-heat exchanger is connected downstream both of the receiving-heat exchanger as well as of the heating-heat exchanger in the flow direction of the coolant.