alright guys, this weird thing started happening yesterday evening.... I've had the car for 2 years and the temperature gauge has NEVER gone above the half way mark regardless of driving, sitting in traffic on hot days etc. However, I was driving home yesterday evening and it suddenly started climbing and heading for the red mark, then it dropped just as quickly and stayed at half way again. Same again this morning on the way to work, drove for 5 minutes then dropped my son off, it rose quickly and got towards the top again so I turned the ignition off for a few mins then on again, temp was stable at half way. Engine doesn't feel like it's overheating, are the gauges prone to going a bit wobbly? Also, a couple of times last week, when I stopped in traffic the car wasn't idling smoothly like it usually does - it was revving from about 1.5-2k about twice a second then back to normal (sitting happily at 1k) after a few more miles of driving. Any idea if the two things are related? Thanks.