I have a 2017 Q50 RedSport. The cruise control sucks. Sometimes when I go to use it will not turn on. If I continue to try and set it it will go into malfunction mode. It seems as if it is worse in the summer months than winter. I live in AZ so it gets very hot here. I have taken it to two different dealerships and they have yet to figure it out. I have had the computer replaced and nothing. Has anyone else on the forum had the same issue and were they able to get it fixed? Any help is appreciated. I have a picture of the dash after it goes into malfunction mode. I do have the adaptive cruise control on the car.