hi think i need some help after the car going in to bmw garage to get a compression test done 189 psi -200 psi all was ok was coming back from Dundee yesterday and the temp sign came on again yellow and then red so pulled over and let it cool down then opened the expansion bottle and there was antifreeze in it and the fan was running to cool the engine down so topped up and continued on my way home just to say there was no water any where heater works as it should just to hear that gonk is getting on my nerves as i no it is something to do with the heateing i have just about had it and i am thinking of returning the car back to the dealers as i can not go far with out the hearing the gonk going off hope to hear from you soon david