Lisa

Thanks for reply. I had called into dealer earlier and he explained exactly the same mechanism. Mystery solved!

I would be interested to find out if you are still getting the white smoke problem. Our C8 2.0 HDI SX is just under 1 week old and today I have noticed white smoke coming from the bottom of the car. This has happened 4 or 5 times today, always after a short journey and accompanied by a smell of something overheating. Anybody else notice a similar problem? Have to say that, other than the white smoke, I am very pleased with the car, beautiful to drive.