My A6 is 18 months old with 8700 miles on the clock, mixed town and motorway driving. The car says it will need oil change and inspection in 6 months or at 10400 miles. Bottom line is that the car will not have had an oil change for 2 years by then which seems excessive . It’s a 3.o litre diesel. I also heard horror stories about this costing over £500 for two hours work at a dealer. Any thoughts , anyone?