hi.. i need some help i have a 93 mercedes 300 se and im having problems with it running a little hot, its running at 100 degrees and the little tank is overflowing i can see steam comming from it, also i was thinking it was the thermostat so i remove it and its still running hot, it takes a while to get hot not real fast, and no water in oil no oil in water so my question is what do i check for next and thanks again for the help.