The boys and girls using the EC135 in the Middle East will have much better information than me, but all that glass cockpitry is a bit sensitive to high temperature. Flying for the police in the UK we occasionally get a warmish day and if the aircraft is left out on the pad it can cause problems. Various units use portable radiation shields in the cab to reduce the heat soaked into the instrument panel, which seems to help.
Generally, the glass cockpit is pretty reliable but it does play up when it gets hot. EC have setup the vent system so that it diverts the air to the instrument panel rather than the crew, so they obviously are aware of the issue. I don't have an FM to check but I recall the whole issue starts at 30 C.