A system for controlling an intake temperature (T g2) of a charge air, which is fed into an internal combustion engine of a vehicle, wherein the system comprises: a water-to-charge air heat exchanger, which is switchable connected to a high temperature coolant loop and/or to a low temperature coolant loop to exchange heat, and a charge air duct operatively connected to the water-to-charge air heat exchanger; wherein the water-to-charge air heat exchanger comprises a high temperature exchange stage and a low temperature exchange stage for exchanging heat between a coolant and the air conducted through the charge air duct, respectively; the low temperature exchange stage having an inlet and an outlet connected to the low temperature coolant loop by a supply line and a return line; the high temperature exchange stage having an inlet and an outlet connected to the high temperature coolant loop by a supply line and a return line; and the inlet and the outlet of one of the low temperature exchange stage and the high temperature exchange stage are switchable connected to the corresponding one of the low temperature coolant loop and the high temperature coolant loop, and are switchable connected to the supply line and the return line of the other one of the low temperature exchange stage and the high temperature exchange stage via a three-way valve (434i, 343i; 434o, 343o), respectively; a pump driving the low temperature coolant loop that is arranged upstream to the respective three-way valve (434i, 343i) by which the inlet of the low temperature exchange stage is switchable connected to the low temperature coolant loop and to the supply line of the high temperature exchange stage; a connecting air duct that connects the water-to-charge air heat exchanger to the internal combustion engine; detecting means for detecting the intake temperature (T g2) of charge air in the connecting air duct or downstream of the water-to-charge air heat exchanger; detecting means for at least one environmental or powertrain parameter of the vehicle; and a control device that is coupled to the detecting means for the intake temperature (T g2) of charge air and that is coupled to the detecting means for the at least one environmental or powertrain parameter of the vehicle; wherein the control device is configured to select a target temperature for the intake temperature of the charge air that is fed into the internal combustion engine according to the detected at least one environmental or powertrain parameter; and wherein the coolant loops (3, 4) are suitable to be switched to be connected or disconnected with the water-to-charge air heat exchanger such that the intake temperature (T g2) of charge air is heated up or cooled down to the selected target temperature. a water-to-charge air heat exchanger, which is switchable connected to a high temperature coolant loop and/or to a low temperature coolant loop to exchange heat, and a charge air duct operatively connected to the water-to-charge air heat exchanger; wherein the water-to-charge air heat exchanger comprises a high temperature exchange stage and a low temperature exchange stage for exchanging heat between a coolant and the air conducted through the charge air duct, respectively; the low temperature exchange stage having an inlet and an outlet connected to the low temperature coolant loop by a supply line and a return line; the high temperature exchange stage having an inlet and an outlet connected to the high temperature coolant loop by a supply line and a return line; and the inlet and the outlet of one of the low temperature exchange stage and the high temperature exchange stage are switchable connected to the corresponding one of the low temperature coolant loop and the high temperature coolant loop, and are switchable connected to the supply line and the return line of the other one of the low temperature exchange stage and the high temperature exchange stage via a three-way valve (434i, 343i; 434o, 343o), respectively; a pump driving the low temperature coolant loop that is arranged upstream to the respective three-way valve (434i, 343i) by which the inlet of the low temperature exchange stage is switchable connected to the low temperature coolant loop and to the supply line of the high temperature exchange stage; a connecting air duct that connects the water-to-charge air heat exchanger to the internal combustion engine; detecting means for detecting the intake temperature (T g2) of charge air in the connecting air duct or downstream of the water-to-charge air heat exchanger; detecting means for at least one environmental or powertrain parameter of the vehicle; and a control device that is coupled to the detecting means for the intake temperature (T g2) of charge air and that is coupled to the detecting means for the at least one environmental or powertrain parameter of the vehicle; wherein the control device is configured to select a target temperature for the intake temperature of the charge air that is fed into the internal combustion engine according to the detected at least one environmental or powertrain parameter; and wherein the coolant loops (3, 4) are suitable to be switched to be connected or disconnected with the water-to-charge air heat exchanger such that the intake temperature (T g2) of charge air is heated up or cooled down to the selected target temperature.