Hi, I drive a 2014 Tiguan 132 TSI Pacific, and recently while driving at low speed (50-60kmh) a sudden high speed spinning/grating sound for approx 3/4 second happens under bonnet. It is as though a high speed flywheel is not gripping momentarily..hard to explain. Happened several times, there’s no stress on the engine (straight/flat driving) so no apparent reason for the sound. I can’t replicate it at a service agent, but have been able to record it. Any ideas, assistance would be welcome!