Engine noise

[Battlecat714]

On my 95 e320, there seems to be a constant cricket noise coming from the front of the engine block, radiator, condensor area. It sounds when the car is hot, it's not so loud when idling or changing from "P" to "D," but once you're driving, either foward or reverse, it gets louder and faster (1000-3500rpm). I could deal with a one or two engine noises but this one's really obnoxious. Thanks in advance.