Thanks Oldsinner... The head... thats what I was thinking. It was so tempting, because before I bought my 1988 I wanted a W140 with the 6-cylinder and I wanted the LWB model, but this one looks like while it may be cheap now, it could run into big $. He said that the wiring harness had not been replaced to his knowledge, nor had the evaporator, but he said the A/C did work.
Thanks for the offer of helping me check it out... I think if I bought it though, I wouldnt be able to afford to repair it. LOL.