At idle I can hear a bearing type rumble on my tdi90 I initially thought it was a cambelt or Drivebelt pulley. However using a stethoscope suggests it is coming from the gearbox end of the engine. Clutch in or out makes no difference and it disappears at anything above idle. The car drives well and the Clutch works as it should. I'm thinking DMF. Is this possible? Otherwise it's got to be bottom end bearings, but I don't think so. The car has done 210k kilometres