Hi. I was driving my 2008 C4 the other day when the "STOP" warning appeared on the dash with the following message appearing on the display "engine Temperature to high" I pulled over switched off the engine for 5minutes and proceeded to drive for another 30k not going above 60KM/hr. There was no repeat of stop sign appearing, until I hit the motorway where I exceeded speeds of 80km per hour, for about 5 minutes, then same thing happened again with the "STOP" symbol lighting up on the dash with the same message.In order to get get home I travelled at the 60km speed for another 20K with no repeat of warning sign appearing. Has this happened to anybody else? Coolant was low in car, this has since been topped up. Would this be linked to temperature sensors?