This is likely an old thread now but IMO the answer is the salesman is not knowledgeable about XF interior color options and dosent see DIRTY for what it is. The two tone is beautiful but requires up keep and the steering wheel, if vanilla, even more. All the work is well worth it
I found SD-20 All Purpose Degreaser by Spartan Chemical Co. Out of Ohio will remove the worse stain. I follow up with Lexol leather products and the area is good as new.