I had the chance to discuss with Tim Kozub ( a famous car designer from General Motors)
And I can tell you the most important things he told me:
it equally important to have good ideas, and be able to draw them as well. He says the flashier the sketch, the more you get noticed.
3 Most important things
1.) Drawing talent (practice, practice, practice)
2.) Verbal and written ability to communicate your design
3.) Dealing with ambiguity / Rolling with the punches
I hope it can help you :)