The start/stop automatic of the Cayenne (S) somehow does not work properly. It only switches off the engine in felt 30% of all stops. At the very cold temperatures of the last few weeks it actually did not work at all. Can anyone confirm that? Not that I would attach a great importance to it. If one considers that at idle in the hour perhaps 1-2 liters are consumed, is the influence of a few minutes of accumulated ampelstops on to completely neglect the average consumption, but I would be interested in what this is all about! What parameters does it depend on and why?