When I am running my a/c, I notice that when I stop at a stoplight or am stuck in traffic the temp. gauge rises very high. When I proceed in normal traffic it goes down. I also noticed that my in-dash outside temp. gauge no longer works. Are the two in correlation with each other?. I plan to take the car to my indy. next week and I wanted to be able to give them some idea as to what is really going on with this car. The car is a 1993 300e. Thanks in advance.