The Coverage seems not to be the right thing for my problem.

here you can see the orignal image from the audi tt (as example)
https://rieder.tophunter.at/3d/oben.jpg

and here you can see the image in maya:
https://rieder.tophunter.at/3d/oben_maya.jpg

you can see the difference.
so, what I can do that I can have the original texture with absolut no distortion.

thx
bernhard