Hello, first of all, a warning to all those who didn’t know this yet: Does not transport tires on the leather seats or on the leathered back seat!!! I had to make this experience now. It also does not help if the tires are transported in this protective foil. The oils, the soot and any plasticizer diffuse through the foil and also discolor black leather. Perhaps a thick wool cover between tires and leather – or preferably put it in the trunk with it… But now to the actual question: Did someone already have such a case and can tell me how it went? I already had contact with the leather center. The leather is discoloured and this discoloration can be removed as easily as a tattoo! That can be fixed, but only by a specialist workshop. There is then a blocker applied to prevent the “black plague” from coming back from below. Then the surface will probably be recolored. Then would be nice, if someone knows with it and can report what the “reparatur” cost and if in the long term it still doesn’t matter to me to show the fact that it doesn’t matter brightly wears down.