[nb]

I don't have the models with me at the moment, but I'll post the pictures, so you'll see how these parts are done. These are very common to many modern cars.

Generally speaking, you can make two or three surfaces and fit them together using "Match Surface" command. Or you can make a single larger surface and move the control points, so when shape is ok you cut off all the extra areas.

The rear fender is more difficult, you'll have to do it in two steps: 1. you do the fender as it would look without the edge on the side of the car. 2. you make the side of the car and fit the surfaces to the fender.