That's nice of Bentley. You spend £115,000 on a car and Bentley gets sniffy about replacing a wheel bearing that should have lasted three times as long and would have on a better built car like a Ford. Brake discs are a bit different. If the car has spent long periods standing, particularly over the winter, then corrosion could have got a hold and eaten into the discs. Paradoxically they would probably have lasted a lot longer if you had been doing 20,000 miles a year as frequent braking would have rubbed the surface rust off, preventing it from getting a hold. Nevertheless Honda dealers replace rusted discs no quibble as long as the car remains under warranty.