Been having the temp gauge doing weird things, Starts off cold as normal, goes up a bout a quarter when urban driving, but only reaches half if I'm sitting in traffic for ages, then as soon as I'm moving again goes down almost to complete cold again. Temp sensor or something more sinister? All levels appear correct under bonnet, engine idling fine, no loss of power. should it fluctuate quite that much? never noticed it till now.
Cheers
Austin