Audi S8 D2 Facelift correct size discs??

[H24k]

I have both an early 1999 facelift S8 and a later 2000 facelift, the difference between cars seems to be the badging on rear and front, the earlier car has the same badge as the pre facelift S8 and also the same badge on instrument cluster, but it also seems that the brakes might be different as ive just bought a set of mintex 280mm for the rear and they dont fit which seems to indicate that only 269mm will fit? However my other car seems to be ok with the 280mm, Im wondering if the pre facelifts had 269mm at the rear and this was carried on in the early facelift models and then upgraded to the 280mm later? Does anyone know?? Thanks