Costs of an S5?

[sneaky]

Hello guys I'm new to the Audi scene.

For my next car I was thinking of an S5 (4.2 v8) just wondering if you guys could fill me in on a few things?

I know the runnings costs will be high ofcourse (mpg, tax,insurance)

Any known faults on these cars?

What is the service intervals like and how much would they be?

Looks forward to hearing from you,

Marc