What you are seeing there is wear and tear from you getting in and out...about every car gets this way after time...If you are trying to get rid of the creases in the leather that's permanente...As to bring them back to life or add essentials oils back into the leather...there is nothing short of Leatherique that I have found that rejuvenates like it dose....if you are looking at the sagging of the leather then that's in the foam inserts that you could replace...I'm going to do that on my 99 BMW that looks about the same.
The one thing that I like about leatherique is that it absorbes into the leather and draws all the dirt out, then the rejuventor oil really bring back the soft touch feel...its a long process but in the end its worth the time IMO