Volkswagen Jetta Dual Mass Flywheel Failure. The flywheel for the 2006-2008 Volkswagen Jetta with the 2.0L Turbo engine is a non-conventional "Dual Mass" flywheel. It is known to make a light rattling noise when the engine is cold, and should subside once the engine temperature rises. If the rattle doesn't go away when the engine is warm, the flywheel may have failed.
The solution is Volkswagen Jetta Dual Mass Flywheel replacement.