For what it is worth, I just finished a road trip today in my 81 300D and the temperature sat halfway between the 80 and what think is the 100 mark. So I was running about 90 degrees at 70 miles an hour. I thought that was ok - but now you guys have me worried! I just went out and checked the coolant and it is fine. The only time it ever operated above that point is when my water pump failed and I had to repalce it.
I'll just keep an eye on it as the summer gets here, but I'm inclined to think it is ok.....guess I am just paranoid!
