I have a 2004 Boxster with about 1900 miles. I was reading about how you should check you coolent regularly, so I went out to check mine and I cannot see the coolent level at all on the readout. It is on level ground, even with a flashlight I could not see any coolent. How could I check to the level other than looking at the gauge? My tempuraure is generally just past 180 (just to the right of the 0) in 85 degree weather.