I work on a different German make, but I have a friend who's a service advisor at an Audi dealer. From what I'm hearing, aside from the usual German car gremlins due to a hyper-complex computer networks controlling everything, there's an endemic issue with the timing chain on nearly all the Audi's. Either the tensioner loses pressure when the engine isn't running and providing oil pressure, or some other similar thing happens. End result is the possibility of slack timing chain at start-up, which can lead to jumped time.
I know this is an issue with certain MB engines as well, as I've installed updated chain tensioners with ant-drain valves to they don't lose pressure when the engine isn't running.