Recently bought 2003 2.3jtd camper with 25k on the clock. It has a dealers warranty for three months, two of which remain. The noise is not always there but generally occurs on the up change when the clutch is depressed and the lever is advanced. It sounds and feels like the release bearing but it's never heard when stationary and the clutch depressed or even early on into a journey. Is this a common problem that is known? We need to get this sorted within the warranty.Thanks