I have found whilst moving house a VW/Audi "training video" called strangely, Four Wheel Drive, and is about half hour long.
It explains the ins and outs of the Quattro and the Syncro systems, well in 1987 anyway.
Its full of 80'sness, featuring audi coupe quattro,audi 80, VW type 2 Syncro, and Golf syncros, in action.
It contains technical info on how it all works, evolved and why etc.
Its on VHS and there's only one little glitchy bit, and doesn't really affect the viewing.
I was thinking if there was enough interest I could convert to dvd for a couple of beer tokens.
Heres some screen shots of what to expect.....







