I have owned my 62 C60 since like 89 and it has always done the same thing. Yet never have I seen a puddle or even a wet wheel. It especially happens when sitting. I know to check the level on a regular basis and keep it topped up or I will have to bleed it. Everything is working perfect. It never happens during use. I always check the level before a return trip and it never needs any, just after sitting.
