Vehicle : Citroen C4 GP Built : 2007 KM Stand : 98.000km Gasoline 1.8 120VTI Problem : If I drive with full crew or trailer the warning message STOP MOTORTEMPERATUR appears at times accompanied by a loud beep. That stops at max. 10 sec. and disappears again. After that no more message appears. Is only once. Someone an idea? (picture I have from the internet, that looks like with me with the message)