What size brakes to i have please ?
 

im buying some new discs and there seems to be 356mm discs 330mm and 310mm
all listed for the W12 ?

im looking at some foating bilstein discs and they are listed as 310 mm for some reason ...... i thought they were 330 ish ?

any help thanks

Only way to know for sure is to measure old discs

Pretty sure your W12 should be either the 363 or 380 at the front.

I thought you had the 385mm discs from the S8 on your car Guy. I looked on the Brembo website and whilst all the other A8 versions are covered with 323 or 360mm replacement discs, they don't offer a replace for the A8 W12 or S8. Eurocarparts have Pagid discs listed in all the different sizes, including the 385mm.