[wrickem]

I've got Opal White Merino Individual in my '16 435 and it still looks like new. Since I usually wear jeans and I do get some blue dye marks on the seat bottom, but it usually comes right out with a damp cloth. I'll also use Leather cleaner if it does not come out perfectly with water.
I am super careful with leather belts and jackets though, I had either my jacket or belt burnish into the leather on my X3 years ago, so I always watch leather on leather since nothing took that out.