Just so you know. I live near Portland, and I've got 12k on my 300Tdi. I have an electric fan on the radiator, and I've used it four times. I turn it on when I get over 190 degrees. It also gives you a giant empty space up front to reach into when you are doing any kind of work on the front end of the engine. I always figured if the summer months start pushing my temps up, I'd spend more money on a better fan, or go to a standard set up. But I have trouble ever getting it over 180, even after 30 minutes of driving with 75% of the radiator covered in the winter months.