Examples of answers:
- The most impressive car design I've ever seen is one model of Bentley called "New Continental GT finished in Extreme Silver";
- The most impressive car design I've ever seen is one model of Aston Martin called "DB9";(thank you felipeh6 for your examples).
- I did not have the opportunity to visit Salão do Automóvel but I saw some images of the cars on TV and internet and got really surprised not only by the design but also by the technology used in some of them.
Now it's your turn!