 The Tiguan a nice car in many respects, but the automatic transmission shifting is awful.  It frequently shifts into too high a gear causing the engine to lug and vibrate.  Then it shifts back down, only to try shifting back up again later.  It was benign enough during the test drive, but the vibration noise and constant shifting becomes really annoying over time.  This problem persists in newer models because it's VW's way of reporting better fuel mileage than the car actually gets under real world conditions.