hmm... I just bought a 2007 Cayman on my birthday in 9/2007. I drove it home, and show it to my friend that night. We found out that the coolant is low! It's below the minimum mark. On the advice of my sales person, I added some coolant myself. A week later, I recheck it again in the morning before I head out to work. The coolant is below minimum line again! I am going to take it to the dealer tomorrow for a check up.