service costs

[spj]

sorry,think i posted this originally in the wrong place.I've just booked my 2015 s6 into nottingham audi for a 38000 mile service and they've quoted  around £789.00. seems alittle expensive,does anyone know if this sounds about right,they have said spark plugs don't need doing as they were done when i purchased the car last year at 34000 miles.transmission fluid changed also last year.many thanks for any comments.