The crease? I doubt it.
No the stain
What is the stain from? There when you bought it?
Take it to an experienced auto detailer shop. If anybody can get the stain out they can.
It's a new 2017 subaru Legacy the rest if the search are good
Try a good leather cleaner like Meguiars --------- http://www.meguiars.com/en/
I have been using Meguiar's G10900 Gold Class Rich Leather Cleaner & Conditioner Wipes
Follow up with a good leather conditioner.
Connolly Hide products are excellent. They probably are best on vat dyed leather rather than surface dyed.
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