Another good thing that works at taking marks off of leather is a Mr. Clean Magic Eraser. I have tan leather in my other car and the blue jean dye from my jeans "stained" the leather. I used a damp rag, mild soap and a leather cleaner to no avail. My wife was using one of those magic erasers to clean the handle on our fridge, so I said what the heck. I took it down to the car, dipped it in a bucket of clean water, gave it a squeeze to get the excess water out and wiped an area where the blue jean dye was...VIOLA!!! Ended up cleaning the whole interior with a couple of them (they really work good on the plastic trim too). On the leather, the eraser leaves a light residue so used a **** rag to wipe the seats down and then go over them with a conditioner. Your seats will look brand new!!!