this is the tutorial for people learning how to do "Audi R8".
open the body in an assembly.
then click New part in the drop-down list of Insert Components.
click edit part for the new part that is created and then choose the "offset surfaces" in the surface tab and then choose the front bonnet of the body.
then open this part in a new window for clarity.
after that draw the sketch that is in the pic on the right plane.
After drawing the sketch add a reference plane perpendicular to the line and at the point of the line as in the pic.
Knit the surfaces of the bonnet.
Draw the sketch on the reference plane that we created above.
extrude the sketch with the thin feature till the bonnet of the car.
After this offset the bonnet surfaces 5mm.
use "Cut with Surface" option to remove the waste part of the logo.
use "Delete body" feature to delete the bonnet an the offset surface.
use "Delete Face" to just smooth the face of the logo.
use "fillet" feature to smooth the edges
after this you will get the final product the completely finished Audi logo for Audi R8.