Thanks for the information!
I really am just trying to do anything possible to get a little more power and MPG out of this motor with out compromising on reliability.
I just put new tires on it, ordered, a k&n, tie rod assembly, and rear stay control arms. I have already replaced engine fuel lines, glow plugs, and removed fuel thermostat.

I have electric fan thermostat kit that I will put on it to give it a try. I will let you know how it goes. Is there anything else that you know of that could help I would appreciate the help. I am not only new to MB, but also new to diesels.