What should I do if the Engine Coolant Temperature warning lamp illuminates red while driving?

Stop the car as soon as safety permits, switch OFF the START/STOP Switch, and contact an MG Authorised Repairer immediately. High engine coolant temperature could result in severe damage. If the lamp is flashing rather than solid red, this indicates that the coolant temperature sensor has a failure, and you should also stop the car as soon as safety permits. (Page 42)