Hi,
There are a few different layouts in the manual for the different model clios, but one of them has the following layout. The speedo is on the left, the coolant temperature gauge is in the middle, and the fuel gauge is on the right. Under the middle gauge are all your warning lights, and under the fuel gauge are your fuel and headlight indication lights. If your coolant gauge is reading fully to the right, then it is indicating an overheat. You should also have the red warning light below it with the same symbol if you have an overheat.
Cheers now
Ken Chapman
August 2007