I jokingly say this product will turn a dog's rawhide chew into a kid glove. I have had some luck with leather dashes with this method. Once the leather has softened, I have been able to gently tuck it back under the edges of the trim and windshield clips. This is a lot cheaper than a new dash and may be worth a try before spending a ton of money. If your leather or vinyl has scuffmarks, scratches or areas that the surface color has been removed, you may refinish it yourself.
Most German seats are famous for scuffing on the left bolster of the driver's seat.
This is usually caused by your belt loops as you get in and out of the seat. The key is another Surflex product. Any interior leather or vinyl surface may be refinished. It is not recommended to spot finish any area. If your seat bolsters have belt loop scuff marks, you should refinish the entire front of the seat.