Q: I have tried to take exceptionally good care of my 2006 Jetta's interior and exterior, but this winter a 1/4-inch crack appeared in my dash. It almost looks like it has been cut, and I have no idea ...

If there is a great equalizer in cars, it is perhaps vinyl, the plastic ubiquitous in cheap subcompacts and luxury sedans. In the last decade, materials scientists have managed to convince consumers ...