Good day, my existing problem is with the Mercedes Cla car built in 2015. It’s about the car having coolant fluid loss. As a result, we expanded the thermostat and saw that this has a crack. So we replaced the thermostat. For this we had built the suction down to get to the thermostat. Now to the problem: Since the new thermostat is installed, there is no loss. The problem is that the car is not meh After I have noticed this, we have aired the system but that didn’t do anything. If I run the car and the heating is off, I reach the 90 degrees. As soon as I drive and the heating is up, the temperature varies between 40 and 80 degrees. After the airing I am also on the highway, at full load 200-220 km/h in 5th and 6th gear the temperature has remained at 90 degrees, but is after egg What could be the problem here? Ps: I didn’t use an original Mercedes thermostat but a replica. Thank you in advance.