'06 Jetta, DSG auto, 180 k on the clock. About 10 or so seconds after starting, while at idle, our engine starts making a low, deep, growling, rattling noise. Sort of sounds like a bad bearing on a wheel, or a harmonic sound which is related a certain RPM. After warming to around 130 degrees the noise stops, and the engine sounds normal. While the noise is present, before warming, the noise will stop, if, the idle speed is adjusted only slightly, either up or down, but returns if normal idle is allowed to resume. It will also disappear if the shifter is put in drive or reverse, but returns if placed in Park or Neutral. Even placing a minor load on the engine, such as turning on the A/C or the rear window defogger will stop the noise. The noise never returns after the engine warms, unless it is allowed to cool way down. Other than this issue the car runs and drives perfect. Any ideas on the cause, or anyone else have these symptoms?