I drive a 2008 Smart Car for two Passion. I've owned it for a month. The first two weeks I owned it I never once heard what I assume to be the engine fan come on. Yesterday I had an oil change from a regular garage. Not a Smart dealer and not a Mercedes dealer. Now the fan seems to be coming on regularly. Is it possible that something he did has affected the car? Or is this just something normal maybe I did not notice before?