hi can any one help me i was driving my car earlyer(mk4 gti turbo agu) and i noticed the temp sits on just under the 90 and it doesnt go down even when i drive on the motorway it still dont go down does any one no what it is that is wrong cos wen i drive my mrs mk4 it gets to 90 and goes down wen i get on the motorway and the same wen i drive my freinds car as well