I bought a VW Tiguan about nine months ago and I regularly drive just under 1,000 miles per month. At times, when the engine is switched off, a fan in the engine compartment starts. This normally runs for about five minutes and then stops. However, about every two or three months (and so far only after a short journey of not more that four miles), the fan starts but at very high revolutions. This is accompanied by a burning rubber smell. I took it to the dealer after the second time that this happened but they could find nothing (and, of course, I was unable to demonstrate the problem because it happens intermittently). Subsequently I have experimented and find that, when this happens, by re-starting the engine, the fan takes on a more normal tone and speed and, shortly afterwards, stops. In spite of the garage's statement, I remain convinced that there is a glitch somewhere. Any thoughts?