...fine? Can I still drive the car? My 98 BMW z3 started to overheat last night in traffic. I turned the heat on and the temp immediately went back to normal. I drove it a few hours later (in no traffic) and it was fine. I had the radiator replaced last year, but now i'm afraid to drive it to work or to the shop which is far and expensive. Is this just a fluke? Is it safe to drive for awhile until I can take it to the shop?