Problems with a 98 Ford Contour SVT

I have three problems:



1. When my wife drives her car, and comes to a stop or idles, if she has her AC on, she smells exhaust in the car.



2. There is some sort of clicking, possibly electrical, like a relay, coming from behind my wifes glove compartment.



3. When it rains, we sometimes find water in the floorboard of the driver and front seat passenger.