Audi technicians pride themselves on knowing our cars inside out. We asked a team of five to reassemble an Audi A6 Avant. Piece by piece.Along the way, Formula 1 Commentator, David Croft took time out with members of our team to discover how key components work. Here, he looks at a feature synonymous with Audi; quattro all wheel drive.The people featured are real technicians from across our UK Audi Centres. So when you bring your Audi to us, you know you have the experts working on it.Book an appointment with Audi: http://po.st/LCQ