There is another major change for the B9 A4: it looks like Audi has given up its crown-gear center differential, therefore on the 2016 A4 with Quattro AWD system, it is using the Torsen C differential (please note: Audi has a long tradition of using the Torsen differentials in its vehicles previously; the crown-gear type is the firm’s attempt to design/build a different central differential than buying it from JTEKT Torsen, a company now owned by Toyota) .