Every carmaker comes up with a concept car that represents what the future cars of these automakers will look like. And in this race right from affordable brands to premium marques, no one leave any stone unturned to get the maximum number of eyes and rumors. Well it seems like Audi has moved far ahead and came out with something that is too unique to believe. The Audi A9 concept car entered the world of rumors in 2015 and since then it has been one of the hottest topics of the automobile industry. What makes the car all the more sensational is its ability to repair itself and above all what will steal your heart is its changing color. Yes, the car can change its color as per your desire!