[Tommy]

The fact that the symptom is temperature dependent makes me think of two possibilities. One is that the change in temperature is causing something in your camera system to lose contact when it is cold. That could be a very hard problem to find. The other possibility is that some electrical system that only operates when the car is cold is causing the interference mentioned earlier. I'm thinking of something like an automatic seat heater or some engine component that comes on automatically when the ignition is on in cold weather. If you can associate the operation of such a component with the interference, it may be easier to determine what needs to be done to solve the problem.