Start/stop

Hello, We have now also bought a Crossland X 1.2 Turbo with 131hp….We are actually super satisfied with the car, only We have recently 2 problems!!! 1.If you put on the seat belt as a driver, the buckle lamp still lights up an eternity before it extinguishes, sometimes it also goes out immediately…. 2.The start/stop automatic can no longer be activated, in the info display always start/stop is deactivated Temp. inadmissible or so……although the car is operating has 90 degrees and the outside temperature is 1 degree. We have also made all consumers out, nothing changes…… Does anyone ever have this message or from which temperatures is start/stop available??? Thank you