This might be very stupid but I only have this car since 2 weeks (bought used). Today I noticed, that one of the red lights on the spectrum of the cooler temperature measure is on. It is the one closest to the H and there is no connection to all the white lights that rise until about the middle.
What does that mean? Do I need to refill fluid?
Thank you so much in advance. 
If you're are just talking about that single red square at the top of the arc, that's just there to show you were the hot zone is. If your white lights go up to this mark, then you have issues. If your white lights stay in the middle after the vehicle is warmed up (which is what I'd consider "normal" range), everything is as it should be. Sounds like everything is copesetic to me.
