Originally Posted by E90Brian
Probably. How dirty is your leather? You can try a damp towel if it's not too bad, or Woolite mixed 1:10 with water if you don;t want to use the Lexol. If your leather isn't too dirty, the Z10 alone may work just fine. It does on mine, and I have a very light-colored leather. Try just using Z10 on the driver's seat and see how much dirt you pick up--gauge it from that.
Interior is black so it's hard to tell how dirty but I would rather clean them with something first before applying the conditioner.