does any one know if a leather interior from a 19995 a6 will fit a new shape 1999 a6 as the seats look similar in the photo i have seen

 

I compared a few stock numbers of front and rear seats from both '97 and '98 A6's on the Car-Part.com site (everything from a single seller). Different numbers, no interchange. I'd call one of the local recyclers near you and have them verify (or thumbs down) the interchange using their interchange manual.

http://www.car-part.com/