[gallery columns="1" size="full" link="file" ids="96135"] Disguising test mules is common practice in the car industry, but in those late ‘70s years leading up to Audi’s launch of quattro, the idea took on a whole new meaning. In the case of quattro, camouflage was more than just skin deep, and that timeline is most fascinating to recount. While likely no one back then could have imagined how pivotal quattro technology would be for Audi, all indications suggest Ingolstadt knew that the bran...