Hi folks.   My lovely 3.6 has just begun to have its first issue. It's a mild metallic whirring/buzzing sound almost like the noise I used to get from pegging bits of card to my bike wheel as a kid (yes, I lnow...but hopefully some of you will get what I mean...).   The noise rises and falls with revs and the car drives fine. My initial thoughts:   Idler pully alternator pulley fuel pump?? one of the ancillary pulley things DSG issue (6 sp wet bo