Originally Posted by JimPA

It sounds as though you have not yet done anything about the seats. I think your seats just have normal cracking of the original finish, not the leather itself.

The Leatherique suggestion is good. Four years ago I used products from a similar US supplier, Colorplus, to re-dye my Classic Gray front seats, vinyl airbag cover, console and parking brake handle. The color match was perfect. You can also provide a small sample (from a hidden area such as under a seat) for matching purposes.

The keys to success on this project are buying the recommended products to enable proper preparation of the leather and then following directions. After 98K miles my seats still look very good.