You will be very happy with the results of leatherique! I did the whole interior of my old 740il and it turned out brand new looking. I cleaned the seats, sanded them down, filled the leather, sanded again and then dyed them. The seats looked like they just came from the factory. I am not sure about the center section of the porsche seats but the filler will get rid of all the creases and tears in the smooth sections. Here is what mine turned out like
E38 740iL front seat leather restoration project