Porsche Cayenne , mileage – 105,454: The old Flying Pig has been racking up problems that aren’t really its fault at the moment. In a moment of madness my daughter, after cleaning her Golf , decided to hose down her mother’s Porsche. She told us that the rear offside tyre was as flat as a pancake. It took a tank of compressed air and would stay up for half a day, so the puncture is slow enough to get to somewhere with the facilities to change it (there is no spare and I don’t use the gunge stuff unless things are desperate). Then we switch the lights on and bang, the nearside dipped beam bulb has gone.