MMI updating ...
There are reported problems with updates causing corruption of one sort or another but like others elsewhere, I updated with the engine running, didn't touch anything and went from a very early version [0.8.90 - 0890] to 5510 using CD1 from the 5570 kit.
The one potentially irritating issue is that some of the devices [it's not clear which devices and what conditions cause it] are prone to incorrectly going in to 'Component Protection'. In my case the Bose AMP went into CP necessitating a trip to the local Audi dealer.
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